Cisco SPA962-NA Administration Guide - Page 143

Audio Configuration, Authentication ID for SIP authentication.

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Chapter 5 SPA900 Series Phone Field Reference Ext 1/2/3/4/5/6 Tab Use Auth ID Auth ID Cfwd No Ans Delay Mini Certificate SRTP Private Key To use the authentication ID and password for SIP authentication, select yes. Otherwise, select no to use the user ID and password. The default is no. Authentication ID for SIP authentication. Delay, in seconds, before the call forwarding of no-answer calls feature is triggered. The default is 20. Base64 encoded of Mini-Certificate concatenated with the 1024-bit public key of the CA signing the MC of all subscribers in the group. The default is empty. Base64 encoded of the 512-bit private key per subscriber for establishment of a secure call. The default is empty. Audio Configuration 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 Silence Supp Enable Use Pref Codec Only 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. To enable silence suppression so that silent audio frames are not transmitted, select yes. Otherwise, select no. The default is no. To use only the preferred codec for all calls, select yes. (The call fails if the far end does not support this codec.) Otherwise, select no. The default is no. Document Version 3.0 Linksys 900 Series IP Phone Administrator Guide 5-45

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5-45
Linksys 900 Series IP Phone Administrator Guide
Document Version 3.0
Chapter 5
SPA900 Series Phone Field Reference
Ext 1/2/3/4/5/6 Tab
Audio Configuration
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.
Use Auth ID
To use the authentication ID and password for SIP authentication, select yes.
Otherwise, select no to use the user ID and password.
The default is no.
Auth ID
Authentication ID for SIP authentication.
Cfwd No Ans Delay
Delay, in seconds, before the call forwarding of no-answer calls feature is
triggered.
The default is 20.
Mini Certificate
Base64 encoded of Mini-Certificate concatenated with the 1024-bit public key of
the CA signing the MC of all subscribers in the group.
The default is empty.
SRTP Private Key
Base64 encoded of the 512-bit private key per subscriber for establishment of a
secure call.
The default is empty.
Field
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,
G711a, G726-16, G726-24, G726-32, G726-40, G729a, or G723.
The default is G711u.
Silence Supp Enable
To enable silence suppression so that silent audio frames are not transmitted,
select yes. Otherwise, select no.
The default is no.
Use Pref Codec Only
To use only the preferred codec for all calls, select yes. (The call fails if the far
end does not support this codec.) Otherwise, select no.
The default is no.