[cisco-voip] When is Transcoding Required?

[Aaron Riemer]

Hi Guys,

 

Can someone clarify exactly when transcoding between codec's will
actually occur on voice gateways? For example if I have a branch site
with Cisco IP Telephony and the phones are using G.729 and the site has
a voice gateway and PSTN services in what situation will transcoding
occur? Will all inbound and outbound calls through the PSTN require
transcoding? i.e. G.729 to G.711 and vice versa? If the site has 10
lines will I require at least 10 transcoding sessions to cater for 10
simultaneous PSTN calls?

 

Thanks,

 

Aaron.


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