> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getsmartalex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Version history for the telephony documentation and platform.

## 2026-05-15, v1.1

**Native extension mode + self-serve connect flow + per-number diagnostics.**

* **Native Extension Mode (register direction)** shipped as a first-class connection shape. SmartAlex registers itself as a SIP extension on the customer's PBX. INVITEs arrive via the shared registrar trunk; no per-trunk inbound trunk required. See [Native Extension Mode](/telephony/native-extension-mode).
* **Self-serve "Connect PBX Extension"** dialog on the Phone Numbers page. Customers bind a per-tenant extension to a phone number without raising a support ticket. Backs the AI's `transfer_to_pbx` tool with extension matching by name + aliases.
* **PBX extensions directory** added per tenant. Each extension carries a display name and free-form aliases so the AI matches caller phrases ("put me through to the billing queue") to the right SIP URI.
* **Per-number Call Diagnostics panel** on the Phone Numbers page. Click any phone number for: live health check (assignment, registration, credentials), recent call history (last 10 in 24h with friendly-label disconnect reasons), and recent edge function errors (last 5 in 24h).
* **Friendly-label disconnect reasons** in dashboards. Technical codes like `reconciled_never_connected` now render as "Reached us, agent never started". See [Troubleshooting](/telephony/troubleshooting).
* **Cross-tenant guard triggers** on the PBX extensions table prevent any extension from being bound to a SIP trunk or agent from a different tenant.
* **Transfer hardening**: caller ID preservation via P-Asserted-Identity (RFC 3325) confirmed across every PBX integration guide.

**Reference integration:** [Euphoria Telecom](/telephony/euphoria-telecom) is now the model walkthrough for Native Extension Mode, exact dashboard steps, no manual support contact required.

***

## 2026-04-22, v1.0

**Initial telephony documentation release.**

* New Telephony tab with full coverage of PBX integrations
* Integration guides for 3CX, Yeastar, FreePBX, Asterisk, Grandstream UCM, Avaya IP Office, Mitel MiVoice, Microsoft Teams, RingCentral, Euphoria Telecom, Switch Telecom, Generic SIP
* Replacing Your IVR section with 6 real industry conversation flows
* Call Routing & Transfers technical deep dive
* Complete SIP error reference in Troubleshooting
* Security & Compliance posture page
* Network Requirements with firewall rules and NAT guidance
* South Africa regional notes covering POPIA, local carriers, common deployment patterns
* Migration Playbook with phased rollout guidance
* Platform Capabilities matrix
* Testing & Validation procedures
* Capacity, Limits & SLA page
* Observability & Reporting page
* Enterprise FAQ with procurement-grade answers

**Platform context at time of release:**

* SIP ingress hostname: `sip.voice.getsmartalex.com`
* Supported transports: UDP, TCP, TLS
* Default codecs: G.711 u-law, G.711 A-law, G.722
* Transfer mechanism: SIP REFER (RFC 3515) with caller ID via P-Asserted-Identity (RFC 3325)
* Recording retention default: 90 days, configurable 7 to 365 days