Alcatel-Lucent OmniTouch 4135 IP - External Phonebook (LDAP); Searching and Calling LDAP Contacts

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discover the presence and specic type of NAT and obtain the
mapped (public) IP address (NAT address) and port number
that the NAT has allocated for the application’s User Datagram
Protocol (UDP) connections to remote hosts. The protocol re-
quires assistance from a 3rd-party network server (STUN server).
STUN should be activated if an external SIP server cannot con-
nect to the OmniTouch 4135 IP behind a rewall NAT function
and the SIP server supports STUN. A suitable STUN server is
usually provided by the VoIP service provider.
Note: STUN might also be referred to as Session Traversal
Utilities for NAT.
STUN host The IP address or public name of the STUN server.
Offer ICE ICE (Interactive Connectivity Establishment), is a STUN addition
that provides various techniques to allow SIP-based VoIP devices
to successfully traverse the variety of rewalls that may exist
between the devices. The protocol provides a mechanism for
both endpoints to identify the most optimal path for the media
trafc to follow.
TURN TURN (Traversal Using Relay NAT) TURN is an extension of the
STUN protocol that enables NAT traversal when both endpoints
are behind symmetric NAT. With TURN, media trafc for the ses-
sion will have to go to a relay server. Since relaying is expensive,
in terms of bandwidth that must be provided by the provider, and
additional delay for the media trafc, TURN is normally used as
a last resort when endpoints cannot communicate directly.
TURN User User authentication name on the TURN server.
TURN host The IP address or public name of the TURN server.
Password User authentication password on the TURN server.
On phone: MENU > SETTINGS > ADVANCED > (PIN) > NAT TRAVERSAL (6,2,3).
Advanced
Enable SIP Replaces Default is Yes. Setting this option to No, will instruct the PBX
not to use the SIP replace header. Some PBXes try to take over
the bridging functionality from OmniTouch 4135 IP using this
command, which causes the calls to interrupt.
Enable Blind Transfer Default is No. Setting this option to Yes, will enable the transfer
function (MENU > TRANSFER) during a call if the PBX supports
blind transfer.
SETTINGS