Linksys SPA921 Cisco SPA9000 Voice System Administration Guide - Page 249

SPA9000 Field Reference Voice tab B Conference Bridge URL This feature supports external conference bridging for n-way conference calls (n > 2), instead of mixing audio locally. To use this feature, set this parameter to that of the server's name; for example, [email protected]:12345 or conf (which uses the Proxy value as the domain). Default: blank Conference Bridge Ports Maximum number of conference call participants. The range is 3 to 10. Enable IP Dialing Default: 3 To use IP dialing, select yes. Otherwise, select no. Emergency Number Mailbox ID Default: no Comma-separated list of emergency number patterns. If an outbound call matches one of the patterns, the SPA9000 disables call waiting, hook flash event handling, and fax tone detection. Operation is restored to normal when the phone is on-hook again. If you leave this field blank, the SPA9000 has no emergency number. Enter the ID number of the mailbox for this line. Voice tab > FXS 1/2 page Audio Configuration section NOTE 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 G729a 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 codecs. 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, G711a, G72616, G726-24, G726-32, G726-40, G729a, or G723 Default: G711u SPA9000 Voice System Administration Guide 247