Cisco 6821 Administration Guide

DescriptionParameter
To send the configured NAT keep alive message
periodically, select yes. Otherwise, select no.
Default: No
NAT Keep Alive Enable
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
NAT Keep Alive Msg
Destination that should receive NAT keep alive
messages. If the value is $PROXY, the messages are
sent to the current or outbound proxy.
NAT Keep Alive Dest
Network Settings
DescriptionParameter
Time of service (ToS)/differentiated services
(DiffServ) field value in UDP IP packets carrying a
SIP message. Default: 0x68.
SIP TOS/DiffServ Value
Value for the ToS field of voice data packets.
Sets the priority for voice packets in data traffic.
Default: 0xb8.
RTP ToS/DiffServ Value
SIP Settings
DescriptionParameter
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 Configure the SIP Transport,
on page 186 for more details.
Default: UDP
SIP Transport
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
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Phone Troubleshooting
Network Settings

Cisco 6821 Specifications

General

Brand	Cisco
Model	6821
Category	IP Phone
Language	English