System information

Configuring Voice
Configuring Voice Settings
Cisco SPA100 Series Phone Adapters Administration Guide 102
4
SAS Inbound RTP Sink This setting works around devices that do not
play inbound RTP if the streaming audio server
line declares itself as a send-only device and
tells the client not to stream out audio. Enter a
Fully Qualified Domain Name (FQDN) or IP
address of an RTP sink; this value is used by the
streaming audio server line in the SDP of its 200
response to an inbound INVITE message from a
client.
The purpose of this parameter is to work around
devices that do not play inbound RTP if the SAS
line declares itself as a send-only device and
tells the client not to stream out audio. This
parameter is a FQDN or IP address of a RTP sink
to be used by the SAS line in the SDP of its 200
response to inbound INVITE from a client. It will
appear in the c = line and the port number and, if
specified, in the m = line of the SDP. If this value is
not specified or equal to 0, then c = 0.0.0.0 and
a=sendonly will be used in the SDP to tell the
SAS client to not to send any RTP to this SAS
line. If a non-zero value is specified, then
a=sendrecv and the SAS client will stream audio
to the given address. Special case: If the value is
$IP, then the SAS line’s own IP address is used in
the c = line and a=sendrecv. In that case the SAS
client will stream RTP packets to the SAS line.
Default setting: empty
Field Description