Specifications

6-42
Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 6 SPA9000 Field Reference
FXS 1/2 Tab
Streaming Audio Server (SAS)
Field Description
SAS Enable To enable the use of the line as a streaming audio source, select yes. Otherwise, select no.
If enabled, the line cannot be used for outgoing calls. Instead, it auto-answers incoming
calls and streams audio RTP packets to the caller.
The default is no.
SAS DLG Refresh Intvl If this is not zero, it is the interval at which the streaming audio server sends out session
refresh (SIP re-INVITE) messages to determine whether the connection to the caller is
still active. If the caller does not respond to the refresh message, the SPA9000 ends this
call with a SIP BYE message. The range is 0 to 255 seconds (0 means that the session
refresh is disabled).
The default is 30.
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 is used
by the SPA9000’s 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 “sendonly” 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 SPA 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.
The default value is empty.