Cisco SPA303 Administration Guide

Configuring Security, Quality, and Network Features
Configuring Voice Codecs
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 137
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To configure the voice codecs on each extension:
STEP 1 Log in to the configuration utility.
STEP 2 Click Admin Login and advanced.
STEP 3 Click the Ext <number> tab for the extension you want to configure.
STEP 4 Under Audio Configuration, configure the following parameters:
Parameter Description
Preferred Codec Preferred codec for all calls. (The actual codec used in a call
still depends on the outcome of the codec negotiation
protocol.) Select one of the following:
• G711u (all models)
• G711a (all models)
• G726-16 (not supported on WIP310, SPA525G/525G2)
• G726-24 (not supported on WIP310, SPA525G/525G2)
• G726-32
• G726-40 (not supported on WIP310, SPA525G/525G2)
• G729a
• G723 (not supported on WIP310, SPA525G/525G2)
• G722 (not supported on WIP310)
See “Supported Codecs” section on page 132.
Defaults to G711u.
Use Pref Codec
Only
To use only the preferred codecs for all calls, select yes. (The
call fails if the far end does not support these codecs.)
Otherwise, select no.
Defaults to no.
Second Preferred
Codec
If the first codec fails, this codec is tried.
Defaults to unspecified.
NOTE Not applicable to the WIP310.

Cisco SPA303 Specifications

General

Display	Monochrome LCD
Lines	3
Speakerphone	Yes
Headset Jack	Yes (2.5 mm)
Handset	Yes
Ethernet Ports	2 x 10/100 Mbps
Protocol	SIP
Power	Power over Ethernet (PoE) or AC adapter
Audio Codec Support	G.711, G.729
QoS	802.1p/q