Changing the signaling protocol
For enterprises requiring both H.323- and SIP-based protocols, there are two ways
to specify the protocol to be used by all or specific deskphones:
1. As of Release 6.0, you can set the SIG parameter in DHCP Option 242 (Site-
Specific Option Number) or in the 46xxsettings.txt file.
This setting will apply to all telephones except those for which SIG has been
manually configured to a value of H.323 or SIP using the SIG Craft procedure.
2. You can set the SIG parameter on a per-phone basis using the SIG Craft procedure
as described in
Setting or changing the signaling protocol on page 56.
Applying settings to logical groups
You might have different communities of end users, all of which have the same model
telephone, but which require different administered settings. For example, you might want to
restrict Call Center agents from being able to Logoff, which might be an essential capability for
“hot-desking” associates. We provide examples of the group settings for each of these
situations later in this section.
The simplest way to separate groups of users is to associate each of them with a number. Use
the GROUP parameter for this purpose. The GROUP system value cannot be set in the
46xxsettings file. The GROUP parameter can only be set on a telephone-by-telephone basis.
To do so, first identify which telephones are associated with which group, and designate a
number for each group. The number can be any integer from 0 to 999, with 0 as the default,
meaning your largest group would be assigned as Group 0.
Then, at each non-default telephone, instruct the installer or end-user to invoke the GROUP
Local Administrative (Craft) procedure as specified in
About local (Craft) procedures on
page 33 and specify which GROUP number to use. Once the GROUP assignments are in
place, edit the configuration file to allow each telephone of the appropriate group to download
its proper settings.
Here is an illustration of a possible settings file for the example of a Call Center with hot-desking
associates at the same location:
IF $GROUP SEQ 1 goto CALLCENTER IF $GROUP SEQ 2 goto HOTDESK {specify
settings unique to Group 0} goto END
Changing the signaling protocol
H.323 Installation & Maintenance Guide R6.1 May 2011 63
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