Nat Settings - Cisco IP Phone 6851 Administration Manual

NAT Settings

Parameter
NAT Mapping Enable
NAT Keep Alive Enable
NAT Keep Alive Msg
NAT Keep Alive Dest
Network Settings
Parameter
SIP TOS/DiffServ Value
RTP ToS/DiffServ Value
SIP Settings
Parameter
SIP Transport
SIP Port
SIP 100REL Enable
EXT SIP Port
Description
To use externally mapped IP addresses and SIP/ RTP ports in SIP
messages, select yes. Otherwise, select no.
Default: No
To send the configured NAT keep alive message periodically, select
yes. Otherwise, select no.
Default: No
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: $NOTIFY
Destination that should receive NAT keep alive messages. If the value
is $PROXY, the messages are sent to the current or outbound proxy.
Description
Time of service (ToS)/differentiated services (DiffServ) field value in
UDP IP packets carrying a SIP message. Defaults to 0x68.
ToS/DiffServ field value in UDP IP packets carrying RTP data. Defaults
to 0xb8.
Description
Select from UDP, TCP, or TLS.
Default: UDP
Port number of the SIP message listening and transmission port.
Default: 5060
Support of 100REL SIP extension for reliable transmission of provisional
responses (18x) and use of PRACK requests. Select Yes to enable.
Default: No
The external SIP port number.
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