Cisco PAP2 Administration Guide - Page 163
Outbound Call Codec Selection Codes, Using a Dial Plan
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Configuring Regional Parameters and Supplementary Services Using a Dial Plan 8 Outbound Call Codec Selection Codes Codec call selection codes affect voice quality. For more information about voice codecs, see the "Supported Codecs" section on page 118. Outbound Call Codec Selection Notes • You can choose a preferred codec for a call or force a call to use a specific codec. • Prefer G.711u (*017110) through G.729a (*01729)-Sets the preferred codec for next outbound call. If the preferred codec is unavailable, the second, then the third preferred codec is used, if specified (see the "Configuring Voice Codecs" section on page 123). • Force G.711u (*027110) through G.729a (*02729) -Forces the specified codec for next outbound call. If the specified codec is unavailable, the preferred codecs are used in order, if specified (see the "Configuring Voice Codecs" section on page 123). Using a Dial Plan Dial plans determine how the digits are interpreted and transmitted. They also determine whether the dialed number is accepted or rejected. You can use a dial plan to facilitate dialing or to block certain types of calls such as long distance or international. Cisco SPA and Wireless IP Administration Phone Guide 161