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supports setting the media (including codec) policy on a call-by-call basis. Media parameters are defined in the Packet Service Profile (PSP) which can be attached to an IP trunk group or IP Peer. For each call, an ingress PSP and an egress PSP is determined, and then these PSPs are “combined” to arrive at a set of media parameters for the call.
The uses software implementation to strictly check amplitude levels and frequency while detecting inband DTMF digits. The inband DTMF digits amplitude generated from the for G.726 codec is considered bit-less. This may impact scenarios such as an sending inband G.726 digits to a second which is trying to detect tones. In this situation, the inherits the same behavior as the software implementation for detecting inband DTMF digits. This implementation of DTMF functionality is as per standard. The supports detecting inband DTMF digits at power levels above -25 dBm and no frequency detection below -55 dBm.
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