diff --git a/src/components/forms/ai-form.tsx b/src/components/forms/ai-form.tsx
new file mode 100644
index 0000000..249fc5d
--- /dev/null
+++ b/src/components/forms/ai-form.tsx
@@ -0,0 +1,136 @@
+import { Input } from '@/components/base/input/input';
+import { Select } from '@/components/base/select/select';
+import { TextArea } from '@/components/base/textarea/textarea';
+
+// AI assistant form — mirrors AiConfig in
+// helix-engage-server/src/config/ai.defaults.ts. API keys stay in env vars
+// (true secrets, rotated at the infra level); everything the admin can safely
+// adjust lives here: provider choice, model, temperature, and an optional
+// system-prompt addendum appended to the hospital-specific prompts that the
+// WidgetChatService generates.
+
+export type AiProvider = 'openai' | 'anthropic';
+
+export type AiFormValues = {
+    provider: AiProvider;
+    model: string;
+    temperature: string;
+    systemPromptAddendum: string;
+};
+
+export const emptyAiFormValues = (): AiFormValues => ({
+    provider: 'openai',
+    model: 'gpt-4o-mini',
+    temperature: '0.7',
+    systemPromptAddendum: '',
+});
+
+const PROVIDER_ITEMS = [
+    { id: 'openai', label: 'OpenAI' },
+    { id: 'anthropic', label: 'Anthropic' },
+];
+
+// Recommended model presets per provider. Admin can still type any model
+// string they want — these are suggestions, not the only options.
+export const MODEL_SUGGESTIONS: Record<AiProvider, string[]> = {
+    openai: ['gpt-4o-mini', 'gpt-4o', 'gpt-4-turbo', 'gpt-3.5-turbo'],
+    anthropic: ['claude-3-5-sonnet-latest', 'claude-3-5-haiku-latest', 'claude-3-opus-latest'],
+};
+
+type AiFormProps = {
+    value: AiFormValues;
+    onChange: (value: AiFormValues) => void;
+};
+
+export const AiForm = ({ value, onChange }: AiFormProps) => {
+    const patch = (updates: Partial<AiFormValues>) => onChange({ ...value, ...updates });
+
+    const suggestions = MODEL_SUGGESTIONS[value.provider];
+
+    return (
+        <div className="flex flex-col gap-6">
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Provider & model</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Choose the AI vendor powering the website widget chat and call-summary features.
+                        Changing providers takes effect immediately.
+                    </p>
+                </div>
+
+                <Select
+                    label="Provider"
+                    placeholder="Select provider"
+                    items={PROVIDER_ITEMS}
+                    selectedKey={value.provider}
+                    onSelectionChange={(key) => {
+                        const next = key as AiProvider;
+                        // When switching providers, also reset the model to the first
+                        // suggested model for that provider — saves the admin a second
+                        // edit step and avoids leaving an OpenAI model selected while
+                        // provider=anthropic.
+                        patch({
+                            provider: next,
+                            model: MODEL_SUGGESTIONS[next][0],
+                        });
+                    }}
+                >
+                    {(item) => <Select.Item id={item.id} label={item.label} />}
+                </Select>
+
+                <div>
+                    <Input
+                        label="Model"
+                        placeholder="Model identifier"
+                        value={value.model}
+                        onChange={(v) => patch({ model: v })}
+                    />
+                    <div className="mt-2 flex flex-wrap gap-1.5">
+                        {suggestions.map((model) => (
+                            <button
+                                key={model}
+                                type="button"
+                                onClick={() => patch({ model })}
+                                className={`rounded-md border px-2 py-1 text-xs transition duration-100 ease-linear ${
+                                    value.model === model
+                                        ? 'border-brand bg-brand-secondary text-brand-secondary'
+                                        : 'border-secondary bg-primary text-tertiary hover:bg-secondary'
+                                }`}
+                            >
+                                {model}
+                            </button>
+                        ))}
+                    </div>
+                </div>
+
+                <Input
+                    label="Temperature"
+                    type="number"
+                    placeholder="0.7"
+                    hint="0 = deterministic, 1 = balanced, 2 = very creative"
+                    value={value.temperature}
+                    onChange={(v) => patch({ temperature: v })}
+                />
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">System prompt addendum</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Optional — gets appended to the hospital-specific prompts the widget generates
+                        automatically from your doctors and clinics. Use this to add tone guidelines,
+                        escalation rules, or topics the assistant should avoid. Leave blank for the default
+                        behaviour.
+                    </p>
+                </div>
+                <TextArea
+                    label="Additional instructions"
+                    placeholder="e.g. Always respond in the patient's language. Never quote specific medication dosages; refer them to a doctor for prescriptions."
+                    value={value.systemPromptAddendum}
+                    onChange={(v) => patch({ systemPromptAddendum: v })}
+                    rows={6}
+                />
+            </section>
+        </div>
+    );
+};
diff --git a/src/components/forms/telephony-form.tsx b/src/components/forms/telephony-form.tsx
new file mode 100644
index 0000000..d5c55ff
--- /dev/null
+++ b/src/components/forms/telephony-form.tsx
@@ -0,0 +1,177 @@
+import { Input } from '@/components/base/input/input';
+
+// Telephony form — covers Ozonetel cloud-call-center, the Ozonetel WebRTC
+// gateway, and Exotel REST API credentials. Mirrors the TelephonyConfig shape
+// in helix-engage-server/src/config/telephony.defaults.ts.
+//
+// Secrets (ozonetel.agentPassword, exotel.apiToken) come back from the GET
+// endpoint as the sentinel '***masked***' — the form preserves that sentinel
+// untouched unless the admin actually edits the field, in which case the
+// backend overwrites the stored value. This is the same convention used by
+// TelephonyConfigService.getMaskedConfig / updateConfig.
+
+export type TelephonyFormValues = {
+    ozonetel: {
+        agentId: string;
+        agentPassword: string;
+        did: string;
+        sipId: string;
+        campaignName: string;
+    };
+    sip: {
+        domain: string;
+        wsPort: string;
+    };
+    exotel: {
+        apiKey: string;
+        apiToken: string;
+        accountSid: string;
+        subdomain: string;
+    };
+};
+
+export const emptyTelephonyFormValues = (): TelephonyFormValues => ({
+    ozonetel: {
+        agentId: '',
+        agentPassword: '',
+        did: '',
+        sipId: '',
+        campaignName: '',
+    },
+    sip: {
+        domain: 'blr-pub-rtc4.ozonetel.com',
+        wsPort: '444',
+    },
+    exotel: {
+        apiKey: '',
+        apiToken: '',
+        accountSid: '',
+        subdomain: 'api.exotel.com',
+    },
+});
+
+type TelephonyFormProps = {
+    value: TelephonyFormValues;
+    onChange: (value: TelephonyFormValues) => void;
+};
+
+export const TelephonyForm = ({ value, onChange }: TelephonyFormProps) => {
+    const patchOzonetel = (updates: Partial<TelephonyFormValues['ozonetel']>) =>
+        onChange({ ...value, ozonetel: { ...value.ozonetel, ...updates } });
+    const patchSip = (updates: Partial<TelephonyFormValues['sip']>) =>
+        onChange({ ...value, sip: { ...value.sip, ...updates } });
+    const patchExotel = (updates: Partial<TelephonyFormValues['exotel']>) =>
+        onChange({ ...value, exotel: { ...value.exotel, ...updates } });
+
+    return (
+        <div className="flex flex-col gap-8">
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Ozonetel Cloud Agent</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Outbound dialing, SIP registration, and agent provisioning. Get these values from your
+                        Ozonetel dashboard under Admin → Users and Numbers.
+                    </p>
+                </div>
+                <div className="grid grid-cols-2 gap-3">
+                    <Input
+                        label="Agent ID"
+                        placeholder="e.g. agent001"
+                        value={value.ozonetel.agentId}
+                        onChange={(v) => patchOzonetel({ agentId: v })}
+                    />
+                    <Input
+                        label="Agent password"
+                        type="password"
+                        placeholder="Leave '***masked***' to keep current"
+                        value={value.ozonetel.agentPassword}
+                        onChange={(v) => patchOzonetel({ agentPassword: v })}
+                    />
+                </div>
+                <div className="grid grid-cols-2 gap-3">
+                    <Input
+                        label="Default DID"
+                        placeholder="Primary hospital number"
+                        value={value.ozonetel.did}
+                        onChange={(v) => patchOzonetel({ did: v })}
+                    />
+                    <Input
+                        label="SIP ID"
+                        placeholder="Softphone extension"
+                        value={value.ozonetel.sipId}
+                        onChange={(v) => patchOzonetel({ sipId: v })}
+                    />
+                </div>
+                <Input
+                    label="Campaign name"
+                    placeholder="CloudAgent campaign for outbound dial"
+                    value={value.ozonetel.campaignName}
+                    onChange={(v) => patchOzonetel({ campaignName: v })}
+                />
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">SIP Gateway (WebRTC)</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Used by the staff portal softphone. Defaults work for most Indian Ozonetel tenants — only
+                        change if Ozonetel support instructs you to.
+                    </p>
+                </div>
+                <div className="grid grid-cols-2 gap-3">
+                    <Input
+                        label="SIP domain"
+                        placeholder="blr-pub-rtc4.ozonetel.com"
+                        value={value.sip.domain}
+                        onChange={(v) => patchSip({ domain: v })}
+                    />
+                    <Input
+                        label="WebSocket port"
+                        placeholder="444"
+                        value={value.sip.wsPort}
+                        onChange={(v) => patchSip({ wsPort: v })}
+                    />
+                </div>
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Exotel (SMS + inbound numbers)</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Optional — only required if you use Exotel for SMS or want inbound number management from
+                        this portal.
+                    </p>
+                </div>
+                <div className="grid grid-cols-2 gap-3">
+                    <Input
+                        label="API key"
+                        placeholder="Exotel API key"
+                        value={value.exotel.apiKey}
+                        onChange={(v) => patchExotel({ apiKey: v })}
+                    />
+                    <Input
+                        label="API token"
+                        type="password"
+                        placeholder="Leave '***masked***' to keep current"
+                        value={value.exotel.apiToken}
+                        onChange={(v) => patchExotel({ apiToken: v })}
+                    />
+                </div>
+                <div className="grid grid-cols-2 gap-3">
+                    <Input
+                        label="Account SID"
+                        placeholder="Exotel account SID"
+                        value={value.exotel.accountSid}
+                        onChange={(v) => patchExotel({ accountSid: v })}
+                    />
+                    <Input
+                        label="Subdomain"
+                        placeholder="api.exotel.com"
+                        value={value.exotel.subdomain}
+                        onChange={(v) => patchExotel({ subdomain: v })}
+                    />
+                </div>
+            </section>
+        </div>
+    );
+};
diff --git a/src/components/forms/widget-form.tsx b/src/components/forms/widget-form.tsx
new file mode 100644
index 0000000..4a08caa
--- /dev/null
+++ b/src/components/forms/widget-form.tsx
@@ -0,0 +1,167 @@
+import { useState } from 'react';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faPlus, faTrash } from '@fortawesome/pro-duotone-svg-icons';
+import { Input } from '@/components/base/input/input';
+import { Toggle } from '@/components/base/toggle/toggle';
+import { Button } from '@/components/base/buttons/button';
+
+// Widget form — mirrors WidgetConfig from
+// helix-engage-server/src/config/widget.defaults.ts. The site key and site ID
+// are read-only (generated / rotated by the backend), the rest are editable.
+//
+// allowedOrigins is an origin allowlist — an empty list means "any origin"
+// which is useful for testing but should be tightened in production.
+
+export type WidgetFormValues = {
+    enabled: boolean;
+    url: string;
+    allowedOrigins: string[];
+    embed: {
+        loginPage: boolean;
+    };
+};
+
+export const emptyWidgetFormValues = (): WidgetFormValues => ({
+    enabled: true,
+    url: '',
+    allowedOrigins: [],
+    embed: {
+        loginPage: false,
+    },
+});
+
+type WidgetFormProps = {
+    value: WidgetFormValues;
+    onChange: (value: WidgetFormValues) => void;
+};
+
+export const WidgetForm = ({ value, onChange }: WidgetFormProps) => {
+    const [originDraft, setOriginDraft] = useState('');
+
+    const addOrigin = () => {
+        const trimmed = originDraft.trim();
+        if (!trimmed) return;
+        if (value.allowedOrigins.includes(trimmed)) {
+            setOriginDraft('');
+            return;
+        }
+        onChange({ ...value, allowedOrigins: [...value.allowedOrigins, trimmed] });
+        setOriginDraft('');
+    };
+
+    const removeOrigin = (origin: string) => {
+        onChange({ ...value, allowedOrigins: value.allowedOrigins.filter((o) => o !== origin) });
+    };
+
+    return (
+        <div className="flex flex-col gap-8">
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Activation</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        When disabled, widget.js returns an empty response and the script no-ops on the
+                        embedding page. Use this as a kill switch if something goes wrong in production.
+                    </p>
+                </div>
+                <div className="rounded-lg border border-secondary bg-secondary p-4">
+                    <Toggle
+                        label="Website widget enabled"
+                        isSelected={value.enabled}
+                        onChange={(checked) => onChange({ ...value, enabled: checked })}
+                    />
+                </div>
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Hosting</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Public base URL where widget.js is served from. Leave blank to use the same origin as
+                        this sidecar (the common case).
+                    </p>
+                </div>
+                <Input
+                    label="Public URL"
+                    placeholder="https://widget.hospital.com"
+                    value={value.url}
+                    onChange={(v) => onChange({ ...value, url: v })}
+                />
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Allowed origins</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Origins where the widget may be embedded. An empty list means any origin is accepted
+                        (test mode). In production, list every hospital website + staging environment
+                        explicitly.
+                    </p>
+                </div>
+                <div className="flex items-center gap-2">
+                    <div className="flex-1">
+                        <Input
+                            placeholder="https://hospital.com"
+                            value={originDraft}
+                            onChange={setOriginDraft}
+                        />
+                    </div>
+                    <Button
+                        size="sm"
+                        color="secondary"
+                        iconLeading={({ className }: { className?: string }) => (
+                            <FontAwesomeIcon icon={faPlus} className={className} />
+                        )}
+                        onClick={addOrigin}
+                        isDisabled={!originDraft.trim()}
+                    >
+                        Add
+                    </Button>
+                </div>
+                {value.allowedOrigins.length === 0 ? (
+                    <p className="rounded-lg border border-dashed border-secondary bg-secondary p-4 text-center text-xs text-tertiary">
+                        Any origin allowed — widget runs in test mode.
+                    </p>
+                ) : (
+                    <ul className="flex flex-col gap-2 rounded-lg border border-secondary bg-secondary p-3">
+                        {value.allowedOrigins.map((origin) => (
+                            <li
+                                key={origin}
+                                className="flex items-center justify-between rounded-md bg-primary px-3 py-2 text-sm"
+                            >
+                                <span className="font-mono text-primary">{origin}</span>
+                                <button
+                                    type="button"
+                                    onClick={() => removeOrigin(origin)}
+                                    className="flex size-6 items-center justify-center rounded-md text-fg-quaternary hover:bg-secondary_hover hover:text-fg-error-primary"
+                                    title="Remove origin"
+                                >
+                                    <FontAwesomeIcon icon={faTrash} className="size-3" />
+                                </button>
+                            </li>
+                        ))}
+                    </ul>
+                )}
+            </section>
+
+            <section className="flex flex-col gap-4">
+                <div>
+                    <h3 className="text-sm font-semibold text-primary">Embed surfaces</h3>
+                    <p className="mt-1 text-xs text-tertiary">
+                        Where inside this application the widget should auto-render. Keep these off if you
+                        only plan to embed it on your public hospital website.
+                    </p>
+                </div>
+                <div className="rounded-lg border border-secondary bg-secondary p-4">
+                    <Toggle
+                        label="Show on staff login page"
+                        hint="Useful for smoke-testing without a public landing page."
+                        isSelected={value.embed.loginPage}
+                        onChange={(checked) =>
+                            onChange({ ...value, embed: { ...value.embed, loginPage: checked } })
+                        }
+                    />
+                </div>
+            </section>
+        </div>
+    );
+};
diff --git a/src/main.tsx b/src/main.tsx
index b91f2aa..98a0ca9 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -32,9 +32,11 @@ import { RulesSettingsPage } from "@/pages/rules-settings";
 import { BrandingSettingsPage } from "@/pages/branding-settings";
 import { TeamSettingsPage } from "@/pages/team-settings";
 import { SetupWizardPage } from "@/pages/setup-wizard";
-import { SettingsPlaceholder } from "@/pages/settings-placeholder";
 import { ClinicsPage } from "@/pages/clinics";
 import { DoctorsPage } from "@/pages/doctors";
+import { TelephonySettingsPage } from "@/pages/telephony-settings";
+import { AiSettingsPage } from "@/pages/ai-settings";
+import { WidgetSettingsPage } from "@/pages/widget-settings";
 import { AuthProvider } from "@/providers/auth-provider";
 import { DataProvider } from "@/providers/data-provider";
 import { RouteProvider } from "@/providers/router-provider";
@@ -88,36 +90,9 @@ createRoot(document.getElementById("root")!).render(
                                 <Route path="/settings/team" element={<TeamSettingsPage />} />
                                 <Route path="/settings/clinics" element={<ClinicsPage />} />
                                 <Route path="/settings/doctors" element={<DoctorsPage />} />
-                                <Route
-                                    path="/settings/telephony"
-                                    element={
-                                        <SettingsPlaceholder
-                                            title="Telephony"
-                                            description="Connect Ozonetel and Exotel for calls"
-                                            phase="Phase 4"
-                                        />
-                                    }
-                                />
-                                <Route
-                                    path="/settings/ai"
-                                    element={
-                                        <SettingsPlaceholder
-                                            title="AI Assistant"
-                                            description="Choose your AI provider, model, and prompts"
-                                            phase="Phase 4"
-                                        />
-                                    }
-                                />
-                                <Route
-                                    path="/settings/widget"
-                                    element={
-                                        <SettingsPlaceholder
-                                            title="Website Widget"
-                                            description="Embed the chat + booking widget on your hospital website"
-                                            phase="Phase 4"
-                                        />
-                                    }
-                                />
+                                <Route path="/settings/telephony" element={<TelephonySettingsPage />} />
+                                <Route path="/settings/ai" element={<AiSettingsPage />} />
+                                <Route path="/settings/widget" element={<WidgetSettingsPage />} />
 
                                 <Route path="/agent/:id" element={<AgentDetailPage />} />
                                 <Route path="/patient/:id" element={<Patient360Page />} />
diff --git a/src/pages/ai-settings.tsx b/src/pages/ai-settings.tsx
new file mode 100644
index 0000000..baa7263
--- /dev/null
+++ b/src/pages/ai-settings.tsx
@@ -0,0 +1,159 @@
+import { useEffect, useState } from 'react';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faRobot, faRotateLeft } from '@fortawesome/pro-duotone-svg-icons';
+import { Button } from '@/components/base/buttons/button';
+import { TopBar } from '@/components/layout/top-bar';
+import {
+    AiForm,
+    emptyAiFormValues,
+    type AiFormValues,
+    type AiProvider,
+} from '@/components/forms/ai-form';
+import { apiClient } from '@/lib/api-client';
+import { notify } from '@/lib/toast';
+import { markSetupStepComplete } from '@/lib/setup-state';
+
+// /settings/ai — Pattern B page for the AI assistant config. Backed by
+// /api/config/ai which is file-backed (data/ai.json) and hot-reloaded through
+// AiConfigService — no restart needed.
+//
+// Temperature is a string in the form for input UX (so users can partially
+// type '0.', '0.5', etc) then clamped to 0..2 on save.
+
+type ServerAiConfig = {
+    provider?: AiProvider;
+    model?: string;
+    temperature?: number;
+    systemPromptAddendum?: string;
+};
+
+const clampTemperature = (raw: string): number => {
+    const n = Number(raw);
+    if (Number.isNaN(n)) return 0.7;
+    return Math.min(2, Math.max(0, n));
+};
+
+export const AiSettingsPage = () => {
+    const [values, setValues] = useState<AiFormValues>(emptyAiFormValues);
+    const [loading, setLoading] = useState(true);
+    const [isSaving, setIsSaving] = useState(false);
+    const [isResetting, setIsResetting] = useState(false);
+
+    const loadConfig = async () => {
+        try {
+            const data = await apiClient.get<ServerAiConfig>('/api/config/ai');
+            setValues({
+                provider: data.provider ?? 'openai',
+                model: data.model ?? 'gpt-4o-mini',
+                temperature: data.temperature != null ? String(data.temperature) : '0.7',
+                systemPromptAddendum: data.systemPromptAddendum ?? '',
+            });
+        } catch {
+            // toast already shown
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    useEffect(() => {
+        loadConfig();
+    }, []);
+
+    const handleSave = async () => {
+        if (!values.model.trim()) {
+            notify.error('Model is required');
+            return;
+        }
+        setIsSaving(true);
+        try {
+            await apiClient.put('/api/config/ai', {
+                provider: values.provider,
+                model: values.model.trim(),
+                temperature: clampTemperature(values.temperature),
+                systemPromptAddendum: values.systemPromptAddendum,
+            });
+            notify.success('AI settings updated', 'Changes are live for new conversations.');
+            markSetupStepComplete('ai').catch(() => {});
+            await loadConfig();
+        } catch (err) {
+            console.error('[ai] save failed', err);
+        } finally {
+            setIsSaving(false);
+        }
+    };
+
+    const handleReset = async () => {
+        if (!confirm('Reset AI settings to defaults? The system prompt addendum will be cleared.')) {
+            return;
+        }
+        setIsResetting(true);
+        try {
+            await apiClient.post('/api/config/ai/reset');
+            notify.info('AI reset', 'Provider, model, and prompt have been restored to defaults.');
+            await loadConfig();
+        } catch (err) {
+            console.error('[ai] reset failed', err);
+        } finally {
+            setIsResetting(false);
+        }
+    };
+
+    return (
+        <div className="flex flex-1 flex-col overflow-hidden">
+            <TopBar title="AI Assistant" subtitle="Choose provider, model, and conversational guidelines" />
+
+            <div className="flex-1 overflow-y-auto p-6">
+                <div className="mx-auto max-w-2xl">
+                    <div className="mb-6 flex items-center gap-3 rounded-lg border border-secondary bg-primary p-4">
+                        <div className="flex size-10 items-center justify-center rounded-lg bg-brand-secondary">
+                            <FontAwesomeIcon icon={faRobot} className="size-5 text-fg-brand-primary" />
+                        </div>
+                        <div className="flex-1">
+                            <p className="text-sm font-semibold text-primary">API keys live in environment variables</p>
+                            <p className="text-xs text-tertiary">
+                                The actual OPENAI_API_KEY and ANTHROPIC_API_KEY are set at deploy time and
+                                can't be edited here. If you change the provider, make sure the matching key
+                                is configured on the sidecar or the assistant will silently fall back to the
+                                other provider.
+                            </p>
+                        </div>
+                    </div>
+
+                    {loading ? (
+                        <div className="flex items-center justify-center py-16">
+                            <p className="text-sm text-tertiary">Loading AI settings...</p>
+                        </div>
+                    ) : (
+                        <div className="rounded-xl border border-secondary bg-primary p-6 shadow-xs">
+                            <AiForm value={values} onChange={setValues} />
+
+                            <div className="mt-8 flex items-center justify-between border-t border-secondary pt-4">
+                                <Button
+                                    size="md"
+                                    color="secondary"
+                                    iconLeading={({ className }: { className?: string }) => (
+                                        <FontAwesomeIcon icon={faRotateLeft} className={className} />
+                                    )}
+                                    onClick={handleReset}
+                                    isLoading={isResetting}
+                                    showTextWhileLoading
+                                >
+                                    Reset to defaults
+                                </Button>
+                                <Button
+                                    size="md"
+                                    color="primary"
+                                    onClick={handleSave}
+                                    isLoading={isSaving}
+                                    showTextWhileLoading
+                                >
+                                    {isSaving ? 'Saving...' : 'Save changes'}
+                                </Button>
+                            </div>
+                        </div>
+                    )}
+                </div>
+            </div>
+        </div>
+    );
+};
diff --git a/src/pages/settings-placeholder.tsx b/src/pages/settings-placeholder.tsx
deleted file mode 100644
index 2df608a..0000000
--- a/src/pages/settings-placeholder.tsx
+++ /dev/null
@@ -1,47 +0,0 @@
-import { useNavigate } from 'react-router';
-import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faArrowLeft, faTools } from '@fortawesome/pro-duotone-svg-icons';
-import { Button } from '@/components/base/buttons/button';
-import { TopBar } from '@/components/layout/top-bar';
-
-type SettingsPlaceholderProps = {
-    title: string;
-    description: string;
-    phase: string;
-};
-
-// Placeholder for settings pages that haven't been built yet. Used by routes
-// the Settings hub links to during Phase 2 — Phase 3 (Clinics, Doctors, Team
-// invite/role editor) and Phase 4 (Telephony, AI, Widget) replace these with
-// real CRUD pages.
-export const SettingsPlaceholder = ({ title, description, phase }: SettingsPlaceholderProps) => {
-    const navigate = useNavigate();
-    return (
-        <div className="flex flex-1 flex-col overflow-hidden">
-            <TopBar title={title} subtitle={description} />
-            <div className="flex flex-1 items-center justify-center p-8">
-                <div className="max-w-md rounded-xl border border-dashed border-secondary bg-secondary px-8 py-12 text-center">
-                    <div className="mx-auto mb-4 flex size-12 items-center justify-center rounded-full bg-primary">
-                        <FontAwesomeIcon icon={faTools} className="size-5 text-brand-primary" />
-                    </div>
-                    <h2 className="text-base font-semibold text-primary">Coming in {phase}</h2>
-                    <p className="mt-2 text-sm text-tertiary">
-                        This page will let you manage <b>{title.toLowerCase()}</b> directly from the staff portal.
-                        It's not built yet — see the onboarding plan for delivery details.
-                    </p>
-                    <Button
-                        size="sm"
-                        color="secondary"
-                        className="mt-6"
-                        iconLeading={({ className }: { className?: string }) => (
-                            <FontAwesomeIcon icon={faArrowLeft} className={className} />
-                        )}
-                        onClick={() => navigate('/settings')}
-                    >
-                        Back to settings
-                    </Button>
-                </div>
-            </div>
-        </div>
-    );
-};
diff --git a/src/pages/telephony-settings.tsx b/src/pages/telephony-settings.tsx
new file mode 100644
index 0000000..0f67bec
--- /dev/null
+++ b/src/pages/telephony-settings.tsx
@@ -0,0 +1,162 @@
+import { useEffect, useState } from 'react';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faPhone, faRotateLeft } from '@fortawesome/pro-duotone-svg-icons';
+import { Button } from '@/components/base/buttons/button';
+import { TopBar } from '@/components/layout/top-bar';
+import {
+    TelephonyForm,
+    emptyTelephonyFormValues,
+    type TelephonyFormValues,
+} from '@/components/forms/telephony-form';
+import { apiClient } from '@/lib/api-client';
+import { notify } from '@/lib/toast';
+import { markSetupStepComplete } from '@/lib/setup-state';
+
+// /settings/telephony — Pattern B page against the sidecar's
+// /api/config/telephony endpoint. The sidecar masks secrets on GET (agent
+// password + Exotel API token become '***masked***') and treats that sentinel
+// as "no change" on PUT, so we just round-trip the form values directly.
+//
+// Changes take effect immediately — TelephonyConfigService keeps an in-memory
+// cache that all consumers read via getters, no restart required.
+
+export const TelephonySettingsPage = () => {
+    const [values, setValues] = useState<TelephonyFormValues>(emptyTelephonyFormValues);
+    const [loading, setLoading] = useState(true);
+    const [isSaving, setIsSaving] = useState(false);
+    const [isResetting, setIsResetting] = useState(false);
+
+    const loadConfig = async () => {
+        try {
+            const data = await apiClient.get<TelephonyFormValues>('/api/config/telephony');
+            setValues({
+                ozonetel: {
+                    agentId: data.ozonetel?.agentId ?? '',
+                    agentPassword: data.ozonetel?.agentPassword ?? '',
+                    did: data.ozonetel?.did ?? '',
+                    sipId: data.ozonetel?.sipId ?? '',
+                    campaignName: data.ozonetel?.campaignName ?? '',
+                },
+                sip: {
+                    domain: data.sip?.domain ?? 'blr-pub-rtc4.ozonetel.com',
+                    wsPort: data.sip?.wsPort ?? '444',
+                },
+                exotel: {
+                    apiKey: data.exotel?.apiKey ?? '',
+                    apiToken: data.exotel?.apiToken ?? '',
+                    accountSid: data.exotel?.accountSid ?? '',
+                    subdomain: data.exotel?.subdomain ?? 'api.exotel.com',
+                },
+            });
+        } catch {
+            // toast already shown
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    useEffect(() => {
+        loadConfig();
+    }, []);
+
+    const handleSave = async () => {
+        setIsSaving(true);
+        try {
+            await apiClient.put('/api/config/telephony', {
+                ozonetel: values.ozonetel,
+                sip: values.sip,
+                exotel: values.exotel,
+            });
+            notify.success('Telephony updated', 'Changes are live — no restart needed.');
+            // Mark the wizard step complete if the required Ozonetel fields are
+            // all filled in. Keeps the setup hub badges in sync with reality.
+            const complete =
+                !!values.ozonetel.agentId &&
+                !!values.ozonetel.did &&
+                !!values.ozonetel.sipId &&
+                !!values.ozonetel.campaignName;
+            if (complete) {
+                markSetupStepComplete('telephony').catch(() => {});
+            }
+            await loadConfig();
+        } catch (err) {
+            console.error('[telephony] save failed', err);
+        } finally {
+            setIsSaving(false);
+        }
+    };
+
+    const handleReset = async () => {
+        if (!confirm('Reset telephony settings to defaults? Your Ozonetel and Exotel credentials will be cleared.')) {
+            return;
+        }
+        setIsResetting(true);
+        try {
+            await apiClient.post('/api/config/telephony/reset');
+            notify.info('Telephony reset', 'All fields have been cleared.');
+            await loadConfig();
+        } catch (err) {
+            console.error('[telephony] reset failed', err);
+        } finally {
+            setIsResetting(false);
+        }
+    };
+
+    return (
+        <div className="flex flex-1 flex-col overflow-hidden">
+            <TopBar title="Telephony" subtitle="Connect Ozonetel and Exotel for calls and SMS" />
+
+            <div className="flex-1 overflow-y-auto p-6">
+                <div className="mx-auto max-w-2xl">
+                    <div className="mb-6 flex items-center gap-3 rounded-lg border border-secondary bg-primary p-4">
+                        <div className="flex size-10 items-center justify-center rounded-lg bg-brand-secondary">
+                            <FontAwesomeIcon icon={faPhone} className="size-5 text-fg-brand-primary" />
+                        </div>
+                        <div className="flex-1">
+                            <p className="text-sm font-semibold text-primary">Credentials are stored locally</p>
+                            <p className="text-xs text-tertiary">
+                                Values are written to the sidecar's data/telephony.json. API tokens are masked
+                                when loaded — leave the <code className="rounded bg-secondary px-1 py-0.5 font-mono">***masked***</code>{' '}
+                                placeholder to keep the existing value.
+                            </p>
+                        </div>
+                    </div>
+
+                    {loading ? (
+                        <div className="flex items-center justify-center py-16">
+                            <p className="text-sm text-tertiary">Loading telephony settings...</p>
+                        </div>
+                    ) : (
+                        <div className="rounded-xl border border-secondary bg-primary p-6 shadow-xs">
+                            <TelephonyForm value={values} onChange={setValues} />
+
+                            <div className="mt-8 flex items-center justify-between border-t border-secondary pt-4">
+                                <Button
+                                    size="md"
+                                    color="secondary"
+                                    iconLeading={({ className }: { className?: string }) => (
+                                        <FontAwesomeIcon icon={faRotateLeft} className={className} />
+                                    )}
+                                    onClick={handleReset}
+                                    isLoading={isResetting}
+                                    showTextWhileLoading
+                                >
+                                    Reset to defaults
+                                </Button>
+                                <Button
+                                    size="md"
+                                    color="primary"
+                                    onClick={handleSave}
+                                    isLoading={isSaving}
+                                    showTextWhileLoading
+                                >
+                                    {isSaving ? 'Saving...' : 'Save changes'}
+                                </Button>
+                            </div>
+                        </div>
+                    )}
+                </div>
+            </div>
+        </div>
+    );
+};
diff --git a/src/pages/widget-settings.tsx b/src/pages/widget-settings.tsx
new file mode 100644
index 0000000..f4e11cc
--- /dev/null
+++ b/src/pages/widget-settings.tsx
@@ -0,0 +1,199 @@
+import { useEffect, useState } from 'react';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faGlobe, faCopy, faArrowsRotate } from '@fortawesome/pro-duotone-svg-icons';
+import { Button } from '@/components/base/buttons/button';
+import { TopBar } from '@/components/layout/top-bar';
+import {
+    WidgetForm,
+    emptyWidgetFormValues,
+    type WidgetFormValues,
+} from '@/components/forms/widget-form';
+import { apiClient } from '@/lib/api-client';
+import { notify } from '@/lib/toast';
+
+// /settings/widget — Pattern B page for the website widget config. Uses the
+// admin endpoint GET /api/config/widget/admin (the plain /api/config/widget
+// endpoint returns only the public subset and is used by the embed page).
+//
+// The site key and site ID are read-only here — generated and rotated by the
+// backend. The copy-to-clipboard button on the key helps the admin paste it
+// into their website's embed snippet.
+
+type ServerWidgetConfig = {
+    enabled: boolean;
+    key: string;
+    siteId: string;
+    url: string;
+    allowedOrigins: string[];
+    embed: { loginPage: boolean };
+    version?: number;
+    updatedAt?: string;
+};
+
+export const WidgetSettingsPage = () => {
+    const [values, setValues] = useState<WidgetFormValues>(emptyWidgetFormValues);
+    const [key, setKey] = useState<string>('');
+    const [siteId, setSiteId] = useState<string>('');
+    const [loading, setLoading] = useState(true);
+    const [isSaving, setIsSaving] = useState(false);
+    const [isRotating, setIsRotating] = useState(false);
+
+    const loadConfig = async () => {
+        try {
+            const data = await apiClient.get<ServerWidgetConfig>('/api/config/widget/admin');
+            setValues({
+                enabled: data.enabled,
+                url: data.url ?? '',
+                allowedOrigins: data.allowedOrigins ?? [],
+                embed: {
+                    loginPage: data.embed?.loginPage ?? false,
+                },
+            });
+            setKey(data.key ?? '');
+            setSiteId(data.siteId ?? '');
+        } catch {
+            // toast already shown
+        } finally {
+            setLoading(false);
+        }
+    };
+
+    useEffect(() => {
+        loadConfig();
+    }, []);
+
+    const handleSave = async () => {
+        setIsSaving(true);
+        try {
+            await apiClient.put('/api/config/widget', {
+                enabled: values.enabled,
+                url: values.url,
+                allowedOrigins: values.allowedOrigins,
+                embed: values.embed,
+            });
+            notify.success('Widget updated', 'Changes take effect on next widget load.');
+            await loadConfig();
+        } catch (err) {
+            console.error('[widget] save failed', err);
+        } finally {
+            setIsSaving(false);
+        }
+    };
+
+    const handleRotateKey = async () => {
+        if (
+            !confirm(
+                'Rotate the widget key? Any website embed using the old key will stop working until you update it.',
+            )
+        ) {
+            return;
+        }
+        setIsRotating(true);
+        try {
+            await apiClient.post('/api/config/widget/rotate-key');
+            notify.success('Key rotated', 'Update every embed snippet with the new key.');
+            await loadConfig();
+        } catch (err) {
+            console.error('[widget] rotate failed', err);
+        } finally {
+            setIsRotating(false);
+        }
+    };
+
+    const handleCopyKey = async () => {
+        try {
+            await navigator.clipboard.writeText(key);
+            notify.success('Copied', 'Widget key copied to clipboard.');
+        } catch {
+            notify.error('Copy failed', 'Select the key manually and copy it.');
+        }
+    };
+
+    return (
+        <div className="flex flex-1 flex-col overflow-hidden">
+            <TopBar title="Website Widget" subtitle="Configure the chat + booking widget for your hospital website" />
+
+            <div className="flex-1 overflow-y-auto p-6">
+                <div className="mx-auto max-w-2xl">
+                    <div className="mb-6 flex items-center gap-3 rounded-lg border border-secondary bg-primary p-4">
+                        <div className="flex size-10 items-center justify-center rounded-lg bg-brand-secondary">
+                            <FontAwesomeIcon icon={faGlobe} className="size-5 text-fg-brand-primary" />
+                        </div>
+                        <div className="flex-1">
+                            <p className="text-sm font-semibold text-primary">One-line embed snippet</p>
+                            <p className="text-xs text-tertiary">
+                                Drop the script below into your hospital website's <code className="rounded bg-secondary px-1 py-0.5 font-mono">&lt;head&gt;</code> to
+                                enable chat and appointment booking. Changing the key requires re-embedding.
+                            </p>
+                        </div>
+                    </div>
+
+                    {loading ? (
+                        <div className="flex items-center justify-center py-16">
+                            <p className="text-sm text-tertiary">Loading widget settings...</p>
+                        </div>
+                    ) : (
+                        <div className="flex flex-col gap-6">
+                            {/* Site key card — read-only with copy + rotate */}
+                            <div className="rounded-xl border border-secondary bg-primary p-5 shadow-xs">
+                                <div className="mb-3 flex items-center justify-between">
+                                    <div>
+                                        <h3 className="text-sm font-semibold text-primary">Site key</h3>
+                                        <p className="text-xs text-tertiary">
+                                            Site ID: <span className="font-mono">{siteId || '—'}</span>
+                                        </p>
+                                    </div>
+                                    <Button
+                                        size="sm"
+                                        color="tertiary"
+                                        iconLeading={({ className }: { className?: string }) => (
+                                            <FontAwesomeIcon icon={faArrowsRotate} className={className} />
+                                        )}
+                                        onClick={handleRotateKey}
+                                        isLoading={isRotating}
+                                        showTextWhileLoading
+                                    >
+                                        Rotate
+                                    </Button>
+                                </div>
+                                <div className="flex items-center gap-2">
+                                    <code className="flex-1 truncate rounded-lg border border-secondary bg-secondary px-3 py-2 font-mono text-xs text-primary">
+                                        {key || '— no key yet —'}
+                                    </code>
+                                    <Button
+                                        size="sm"
+                                        color="secondary"
+                                        iconLeading={({ className }: { className?: string }) => (
+                                            <FontAwesomeIcon icon={faCopy} className={className} />
+                                        )}
+                                        onClick={handleCopyKey}
+                                        isDisabled={!key}
+                                    >
+                                        Copy
+                                    </Button>
+                                </div>
+                            </div>
+
+                            {/* Editable config */}
+                            <div className="rounded-xl border border-secondary bg-primary p-6 shadow-xs">
+                                <WidgetForm value={values} onChange={setValues} />
+
+                                <div className="mt-8 flex items-center justify-end border-t border-secondary pt-4">
+                                    <Button
+                                        size="md"
+                                        color="primary"
+                                        onClick={handleSave}
+                                        isLoading={isSaving}
+                                        showTextWhileLoading
+                                    >
+                                        {isSaving ? 'Saving...' : 'Save changes'}
+                                    </Button>
+                                </div>
+                            </div>
+                        </div>
+                    )}
+                </div>
+            </div>
+        </div>
+    );
+};