Dial Plan - Cisco SPA303 Administration Manual

Cisco SPA IP Phone Field Reference
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Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
Use Remote Pref Codec
Codec Negotiation
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 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.

Dial Plan

The default dial plan script for each line is as follows: (*xx|[3469]11|0|00|[2-
9]xxxxxx| 1 xxx[2-9]xxxxxx| x xxxxxxxxxxx.).
Description
If set to yes, the phone communicates using the remote
phone's preferred codec. If set to no, the Cisco IP
phone communicates using its own preferred codec
(as indicated in the Preferred Codec field and in the
SDP by order of preferences). The default vale is no.
When set to Default, the Cisco IP phone responds to an
Invite with a 200 OK response advertising the
preferred codec only. When set to List All, the Cisco IP
phone responds listing all the codecs that the phone
supports. The default value is Default, or to respond
with the preferred codec only.
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