Cisco 6800 Series Administration Manual page 291

Phone Troubleshooting
Parameter
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
Description
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. Default: 0x68.
Value for the ToS field of voice data packets.
Sets the priority for voice packets in data traffic.
Default: 0xb8.
Description
Select the transport protocol for SIP messages:
• UDP
• TCP
• TLS
• AUTO
AUTO allows the phone to select the appropriate
protocol automatically, based on the NAPTR records
on the DNS server. See
on page 186
Default: UDP
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
Network Settings
Configure the SIP Transport,
for more details.
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