During the transition to an IP network, VoIP providers are routing voice calls through multiple networks and calls must traverse multiple IP network borders. In addition to the need to support higher layer application-level peering for VoIP services, networks using IP peering are challenged with the issues of media codec incompatibility, especially in larger cross-carrier networks. With an increasingly complex interconnection between networks, carriers need to support different codecs as well as pay load sizes. This necessitates the use of transcending of codecs for a smooth VoIP operation in cross network situation.

Supported Codecs:

1. G711.
   • G.711 -law
2. G723.1
3. G729
   • G729A
   • G729AB
4. GSM
   • MS GSM
   • FR (Full Rate) GSM
5. AMR
   • AMR-NB: Adaptive Multi-Rate Narrowband GSM speech codec.