PSTN to SIP calling
If your network runs over the PSTN and you are in the process of peering with us, please take a moment to ensure the following requirements are met:
- Gateway must have session inactivity timer to prevent runaway calls due to lost signal
- SIP (RFC 3261) compliance
- Gateway must understand DTMF events via SIP INFO method
- Recommended Gateway: Cisco AS5350
- Minimum Codec support: g.711 (a & u), GSM, ILBC
- Optional: Additional Codec support: g.723, g.726, g.729
- Support for TCP and UDP transport protocols
- Periodic or realtime feed of numbers on your network (flat file or lookup directory)
- Optional: End-to-end IP based transport for efficiency Internet
- Optional: Support Transport Layer Security (TLS) for secure communications
Meeting these requirements will ensure successful implemenation of your SIP gateway and interoperability between our networks.
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