Cisco Phone call to call example

mattsthe2

Lets say i have a phone in a remote branch and a phone in the corp office.
I have configured a region that says the call across the WAN to the corp office will be G.729

I have heard somewhere that Cisco Phones at least the 794x, 796x phones have DSP's.

In this instance a transcoder is not required correct?

shodown

mattsthe2 wrote: »

Lets say i have a phone in a remote branch and a phone in the corp office.
I have configured a region that says the call across the WAN to the corp office will be G.729

I have heard somewhere that Cisco Phones at least the 794x, 796x phones have DSP's.

In this instance a transcoder is not required correct?

The DSP's are in the router or gateway device that you are using. No DSP's in the phones that I have heard off.

mattsthe2

sorry what i mean is can a 794x or a 796x phone nativly handle a G.729 or G.711 call without the need of supplementary services such as a transcoder.

mikej412

As long as you're not changing the codec along the path you don't need DSPs or transcoding.

You can check the datasheet for a specific phone on the Cisco website, but G.711 and G.729a audio compression have been supported by the recent phones.