Cisco SPA2102-SF Administration Guide - Page 174

ATA Voice Field Reference Line page B Secure Call Serv Referral Serv Feature Dial Serv Service Announcement Serv Enable Secure Call Service. The default is yes. Enable Referral Service. See the Referral Services Codes parameter for more details. The default is yes. Enable Feature Dial Service. See the Feature Dial Services Codes parameter for more details. The default is yes. Enable Service Announcement Service. The default is yes. Voice tab > Line page > Audio Configuration section A codec resource is considered as allocated if it has been included in the SDP codec list of an active call, even though it eventually may not be the one chosen for the connection. So, 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 G.729a resource is already allocated and since only one G.729a resource is allowed per device, no other low-bit-rate codec may be allocated for subsequent calls; the only choices are G711a and G711u. On the other hand, two G.723.1/G.726 resources are available per device. Therefore it is important to disable the use of G.729a in order to guarantee the support of two simultaneous G.723/G.726 codec. Field Preferred Codec Description 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, G711a, G726-16, G726-24, G726-32, G726-40, G729a, or G723. The default is G711u. Cisco Small Business ATA Administration Guide 174