Audio Configuration Section - Cisco Small Business SPA2102 Administration Manual

ATA Voice Field Reference
PSTN Line page (SPA3102)
Cisco Small Business ATA Administration Guide
Use Auth ID
Auth ID
Call Capacity
Voice tab > PSTN Line page (SPA3102) >

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 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 codec.
Preferred Codec
Silence Supp
Enable
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.
Maximum number of calls allowed on this line interface.
Choices: {unlimited,1,2,3,...25 }. Default is 16. Note that the
ATA device does not distinguish between incoming and
outgoing calls when talking about call capacity.
NOTE: unlimited = 16
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.
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