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32 First time installation of the IP Phone 1535
Ping message to the SPS or SLG before sending the REGISTER
message.
Note: This option to disable the NAT timer on the IP Phone 1535
is not available in firmware versions below V.0.2.25. You must
install the latest firmware version (V2.0.76).
NAT-Traversal: The IP Phone 1535 supports two methods of NAT
Traversal - the SIP-PING method and the • STUN method. For more
information on configuring NAT-Traversal, see "Configuration of
NAT-traversal" (page 32).
—End—
Configuration of NAT-traversal
This section provides a description of NAT-traversal on the IP Phone 1535,
and its subsequent configuration.
The IP Phone 1535 supports two methods of NAT-Traversal:
•
SIP-PING: requires a Border Control Point (BCP) server for the MCS
5100 Release 4.0 and a RTP Media Portal server for MCS 5100 Release
3.5 if it is located behind a NAT/firewall.
•
STUN: The STUN protocol lets a client discover the presence and type
of NATs between the client and the public Internet - a STUN server can
be located using DNS to lookup the domain information of the service
provider.
Enabling STUN protocol
Step Action
1
From the Main Menu, select Settings > VoIP Settings > Proxy
> STUN > Enable.
2 Press OK.
—End—
Configuring the STUN server
Step Action
1
From the Main Menu, select Settings > VoIP Settings > Proxy >
STUN > STUN Server.
Nortel Communications Servers
Nortel IP Phone 1535 Installation and Commissioning
NN43160-300 02.03 Standard
Release 4.0/SN10 28 October 2009
Copyright © 2009, Nortel Networks
.