Cisco SPA232D Administration Manual page 102

Configuring the Voice Settings
Line 1 Settings (PHONE Port)
Cisco SPA232D Administration Guide
Field
SAS DLG Refresh
Intvl
SAS Inbound RTP
Sink
NAT Settings
Field
NAT Mapping
Enable
NAT Keep Alive
Enable
Description
If this value 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 ATA ends this call with a SIP BYE
message. The range is 0 to 255 seconds (0 means that the
session refresh is disabled)
Default setting: 30
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 an FQDN or IP address of an 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, if specified, will appear in
the m = line of the SDP. If this value is not specified or is
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: blank
Description
To use externally mapped IP addresses and SIP/RTP
ports in SIP messages, select yes. Otherwise, select no.
Default setting: no
To send the configured NAT keep alive message
periodically, select yes. Otherwise, select no.
Default setting: no
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