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Configuring the Voice Settings
Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)
Cisco SPA100 Series Administration Guide 81
1
NAT Settings
SAS Inbound RTP
Sink
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
Field Description
NAT Mapping
Enable
To use externally mapped IP addresses and SIP/RTP ports in SIP
messages, select yes. Otherwise, select no.
Default setting: no
NAT Keep Alive
Enable
To send the configured NAT keep alive message periodically,
select yes. Otherwise, select no.
Default setting: no
NAT Keep Alive Msg Enter the keep alive message that should be sent periodically to
maintain the current NAT mapping. If the value is $NOTIFY, a
NOTIFY message is sent. If the value is $REGISTER, a
REGISTER message without contact is sent.
Default setting: $NOTIFY
NAT Keep Alive
Dest
Destination that should receive NAT keep alive messages. If the
value is $PROXY, the messages are sent to the current proxy server
or outbound proxy server.
Default setting: $PROXY
Field Description
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