Set Type Checking And Blocking - Avaya Nortel Communication Server 1000 Manual

194 Features
The G.723.1 codec has bit rates of 5.3 kb/s and 6.3 kb/s. In IP Line, the
G.723.1 codec can only be configured with a 5.3 kb/s bit rate; however, the
system accepts both G.723.1 5.3 kb/s and 6.4 kb/s from the far-end.
T.38 is the preferred codec type for fax calls over virtual trunks. However,
the G.711 Clear Channel codec is used if the far-end does not support
the T.38 codec.
For detailed information about codecs, see

Set type checking and blocking

If the registration is a regular request (not a Virtual Office logon), the Call
Server checks the configured TN type against the actual IP Phone type.
When the LTPS attempts to register the IP Phone with the Call Server,
the following occurs:
•
•
•
However, if the registration request is a virtual logon, this check is not
performed. All IP Phones are allowed to be registered onto any IP TN type
when the logon is through Virtual Office.
Special checking on the self-labeled line/programmable feature keys is
performed when an IP Phone 2004, IP Phone 2007, IP Softphone 2050, IP
Phone 1120E, or IP Phone 1140E user logs in from an IP Phone 2002 or IP
Phone 1220, or when an IP Phone 2002, or IP Phone 1220, IP Phone 1230
IP Phone 2004, IP Phone 2007, IP Softphone 2050, MVC 2050, IP Phone
1120E, or IP Phone 1140E user logs in from an IP Phone 2001, IP Audio
Conference Phone 2033, IP Phone 1210, or IP Phone 1110.
Special checking is required to prevent a user from logging in from an IP
Phone that cannot display an incoming call because the IP Phone used to log
on does not have the self-labeled line/programmable feature keys to display
the incoming call. If the logon was allowed to occur, the IP Phone could ring
Copyright © 2003–2008, Nortel Networks
.
If the TN has Flexible Registration Denied (FRD) CLS set, the Call
Server checks the IP Phone type against the TN type. If the types do
not match registration is rejected and registration in the Emulation Mode
is blocked.
If the TN has Flexible Registration Allowed (default) CLS set, the Call
Server checks the IP Phone type against the TN type. If the types are
compatible, the TN is converted and the IP Phone registers.
If the TN has Flexible Registration on Upgrade CLS set, the Call Server
checks the IP Phone type against the Virtual TN (VTN) type. If the types
are compatible, the TN is converted and the IP Phone registers. After
the TN is converted, the Flexible Registration CLS is set to FRD and
registration in Emulation Mode is blocked.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
"Codecs" (page 215).