Virtual SIP Trunking (vSIP)
Exotel's Virtual SIP Trunking (vSIP) enables enterprise PBX, SBC, and SIP-based platforms to connect directly with Exotel's voice infrastructure using SIP over TCP or TLS. It supports both inbound and outbound PSTN calling through IP connectivity, with optional FQDN-based flexibility.
Alpha Release
vSIP is currently in Alpha. Features and configurations may change before General Availability (GA). Alpha deployments are not covered by production-grade SLAs.
Supported Use Cases​
| Use Case | Description |
|---|---|
| Outbound SIP (IP to PSTN) | Calls from customer SIP infra routed to Exotel, then to PSTN |
| Inbound SIP (PSTN to IP) | Incoming calls to Exophone routed to customer SIP server |
| IP-PSTN Intermix | Bi-directional call routing between IP infra and Exotel VNs |
| SIP Bot Integration | Direct SIP-to-Bot integration with no agent involvement |
| FQDN-based Load Balanced SIP | FQDNs resolve dynamically to multiple IPs for cloud/hybrid setups |
| Native SIP Voicebot Integration | Direct SIP call to customer-hosted SIP-native voicebot platform |
Transport Options​
| Transport | Port | Encryption | DNS Support | Recommended For |
|---|---|---|---|---|
| TCP | 5070 | No | Yes | Default, legacy infrastructure |
| TLS | 443 | Yes (SIP + SRTP) | Yes | Encrypted SIP + SRTP flows |
| FQDN | Any | TCP/TLS | Required | Cloud, autoscaling, HA SIP infra |
Getting Started​
- Create your Exotel account via my.in.exotel.com
- Complete KYC and upgrade the account with your Exotel Account Manager
- Procure Exophones by emailing hello@exotel.com (mention region-specific needs)
- Decide trunking mode: TCP or TLS, Static IP or FQDN
- Share configuration details with Exotel:
- Account SID
- Exophones
- Trunk source IPs (for outbound trunking)
- Trunk destination IPs/FQDN (for inbound trunking)
- Chosen transport protocol (TCP/TLS)
Once provisioned, your SIP traffic will be routed via Exotel's regional edge PoP.
Integration Guides​
Choose the guide that matches your deployment:
- Master Support Guide -- Complete overview of all vSIP integration options
- TCP Integration (Mumbai) -- SIP over TCP setup via Mumbai PoP
- TLS Integration (Mumbai) -- Encrypted SIP over TLS via Mumbai PoP
- FQDN-based Integration -- DNS-based trunking for cloud/HA setups
- Flow Integration -- Route SIP calls into Exotel IVR/agent flows
- Flow and API Configuration -- Full API-driven setup for Voice AI and CC platforms
- SIP-Native Voicebot Integration -- Direct SIP integration for voicebot partners
Edge PoPs and IPs​
| Region | SIP Proxy FQDN | Media IPs |
|---|---|---|
| Karnataka | pstn.in1.exotel.com | 14.194.10.247, 61.246.82.75 |
| Mumbai | pstn.in2.exotel.com | 182.76.143.61, 122.15.8.184 |
| Mumbai Cloud | pstn.in4.exotel.com | -- |
| Singapore | pstn.sgp1.exotel.com | 18.142.150.245, 122.248.223.73 |
Support​
- Provisioning: Contact your Exotel CSM or email hello@exotel.com
- Technical Support: Visit support.exotel.com and share:
- Account SID
- Trunk transport type (TCP/TLS/FQDN)
- Sample Call SIDs
- SIP trace logs (from sngrep/Wireshark)