Configuring Voice Codecs - Cisco SPA 501G Administration Manual

Configuring Security, Quality, and Network Features

Configuring Voice Codecs

Configuring Voice Codecs
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Cisco SPA 500 Series and WIP310 IP Phone Administration Guide
A codec resource is considered allocated if it has been included in the SDP codec
list of an active call, even though it eventually might not be chosen for the
connection. If the G.729a codec is enabled and included in the codec list, that
resource is tied up until the end of the call whether or not the call actually uses
G.729a. If the G729a resource is already allocated (and since only one G.729a
resource is allowed per IP phone), no other low-bit-rate codec can be allocated for
subsequent calls. The only choices are G711a and G711u.
Since two G.723. 1 /G.726 resources are available per IP phone, you should disable
the use of G.729a to guarantee support for two simultaneous G.723/G.726
codecs.
To configure the voice codecs on each extension:
Log in to the web administration interface.
Click Admin Login and advanced.
Click the Ext <number> tab for the extension you want to configure.
Under Audio Configuration, configure the following parameters:
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