Cisco SPA IP Phone Field Reference
Ext Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
343
A
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 might 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 might 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 uses of the G.723/G.726 codecs.
SRTP Private Key
Base64 encoded of the 512-bit private key per
subscriber for establishment of a secure call.
Defaults to blank.
Resident Online Number
For Skype use. Enter the Skype Number
associated with the registration user ID.
SIP URI
The parameter by which the user agent will
identify itself for this line. If this field is blank, the
actual URI used in the SIP signaling should be
automatically formed as:
"sip:UserName@Domain"
Where UserName is the username given for this
line in the User ID, and Domain is the domain given
for this profile in the User Agent Domain. If the
User Agent Domain is an empty string, then the IP
address of the phone should be used for the
domain.
If the URI field is not empty, but is a SIP or SIPS URI
that contains no "@" character, then the actual URI
used in the SIP signaling should be automatically
formed by appending this parameter with an "@"
character followed by the IP address of the
device.
Parameter
Description
