Operation Manual

Configuring the Voice Settings

Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)

Cisco SPA100 Series Administration Guide 81

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

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