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.
Feature matrix
| Feature | Supported | Notes |
|---|---|---|
| SIP ingress protocols | ||
| SIP over UDP | Yes | Default |
| SIP over TCP | Yes | |
| SIP over TLS | Yes | Port 5061, cert-chain note applies |
| IPv6 | Roadmap | IPv4 only today |
| Authentication | ||
| Digest auth | Yes | Default for most customers |
| IP allowlist | Yes | Requires static public IP |
| Combined (digest + IP) | Yes | Defence in depth |
| Mutual TLS | Roadmap | |
| Codecs | ||
| G.711 u-law (PCMU) | Yes | Default |
| G.711 A-law (PCMA) | Yes | Default |
| G.722 HD | Yes | When both sides negotiate it |
| G.729 | On request | Licensed, contact support |
| Opus | Yes | For WebRTC endpoints |
| DTMF | ||
| Receive DTMF (RFC 2833) | Yes | AI detects caller key presses |
| Send DTMF | Roadmap | For IVR navigation downstream |
| In-band DTMF | No | RFC 2833 only |
| Transfers | ||
| Cold (blind) transfer via REFER | Yes | |
| Warm transfer to named person | Yes | With briefing |
| Attended transfer | Roadmap | |
| Transfer to PBX extension | Yes | |
| Transfer to PBX queue or ring group | Yes | |
| Transfer to external PSTN number | Yes | |
| Transfer with caller ID forwarding | Yes | Via P-Asserted-Identity |
| Call handling | ||
| Inbound calls | Yes | |
| Outbound calls (agent-initiated) | Yes | For campaigns |
| Outbound calls (from PBX through us) | Yes | Less common use case |
| Voicemail drop | Yes | Custom message per agent |
| Voicemail detection | Yes | AI detects answering machines |
| Max call duration | 300 sec default | Configurable up to 14,400 sec |
| Silence timeout | 30 sec | AI re-engages or ends call |
| Concurrency | ||
| Per trunk limit | 10 default | Configurable to 1000 |
| Per workspace limit | Plan-based | |
| Global platform limit | Very high | Scales with infrastructure |
| Recording | ||
| Call recording | Yes | On by default |
| Recording retention | 90 days default | 7 to 365 days configurable |
| Per-call suppression | Yes | Agent-driven |
| Download recordings | Yes | Admin users |
| Live monitoring | Roadmap | |
| Transcription | ||
| Real-time transcript | Yes | |
| Post-call summary | Yes | AI-generated |
| Sentiment tagging | Yes | Per call |
| Custom vocabulary | Roadmap | |
| Multilingual transcripts | Partial | Based on agent voice config |
| Observability | ||
| Call logs | Yes | Dashboard and API |
| Call Detail Records export | Yes | CSV, API |
| Real-time webhooks | Yes | |
| Metrics dashboard | Yes | Per agent, per time range |
| SIEM integration | Enterprise plan | Syslog export |
| Quality metrics (MOS, jitter) | Roadmap | |
| Integration | ||
| REST API | Yes | Full CRUD on agents, calls, contacts |
| MCP server | Yes | Exposed at the docs domain |
| Webhooks | Yes | Configurable per agent |
| Custom tools | Yes | Via the tool registry |
| AI capabilities | ||
| Natural language understanding | Yes | |
| Context retention within call | Yes | |
| Knowledge base lookup | Yes | Per-agent KB |
| External tool calls (CRM, calendar, custom API) | Yes | |
| Google Search grounding | Yes | For current-facts questions |
| Custom voice character and accent | Yes | Per agent |
| Multilingual conversation | Partial | English primary, depends on voice |
| Resilience | ||
| Regional redundancy | Yes | Auto-routed to nearest healthy region |
| Graceful degradation on failures | Yes | AI speaks fallback, takes message |
| Automatic reconnect on transient failure | Yes | |
| Session survival across network blips | Limited | Best-effort RTP resume |
Known limits (today)
| Limit | Value |
|---|---|
| Agent system prompt | 32,000 characters |
| First message | 500 characters |
| Extensions per trunk | 10,000 |
| CSV import | 500 rows per batch |
| Concurrent calls per trunk | 1,000 max |
| API request rate | 60 requests/second/workspace |
| Knowledge base document count | 1,000 per agent |
| Knowledge base total size | 100 MB per agent |
On the roadmap
Not promised delivery dates. Organised by estimated priority. Q2 2026:- Attended (warm) transfer with 3-way bridge
- Send DTMF from the AI (for IVR navigation on downstream systems)
- Dedicated South African regional ingress
- Live call monitoring for admins
- Custom vocabulary for domain-specific transcription
- Mutual TLS
- IPv6 ingress
- SOC 2 Type II
- ISO 27001
- On-premise deployment option for regulated industries
What we intentionally don’t do
These are decisions, not gaps.- We don’t replace your PBX. We integrate with it. If you want a PBX replacement, you want a different product.
- We don’t offer a carrier service. We partner with carriers; we don’t terminate or originate calls on our own infrastructure.
- We don’t sell DIDs in every country. Available regions: US, UK, Australia, South Africa, Singapore. If you need a DID elsewhere, bring your own carrier.
- We don’t do SMS autoresponders as a standalone product. SMS send/receive is available via tools during a voice call.
Next steps
Capacity & SLA
Limits, uptime targets, scaling.
Architecture
How it all fits together.
Observability
Monitoring and reporting.