Nortel BCM 3.7, Manual

Page: 154 / 1004

154 Defining trunk module types and settings
N0008589 3.3
You should only have as many lines provisioned on a T1/PRI as you have B-channels being
delivered on the T1/PRI from your service provider. Having more lines provisioned and assigned
to users may occasionally result in the attempt to perform calls over a line failing because of a lack
of B-channel resources being available.
Provisioning notes:
• Deprovisioning all of the lines on a DTM does not disable the module.
• BRI loops/lines are deprovisioned by default in the N1 ISDN protocol regions, otherwise they
are provisioned by default.
PRI B-channel provisioning
When you purchase PRI from your service provider, you can request the number of B-channels
that are allocated for you to use. For example, you may want to use only 12 B-channels instead of
23 B-channels. If you do not have all of the PRI B channels, you should disable all the B-channels
that you do not need.
It is recommended that the number of lines that are deprovisioned on an DTM (configured as PRI)
be the same as the number of B-channels that are disabled. For example, If the DTM is on bus 07,
when B-channels 13-23 are disabled, you should deprovision lines 73 to 83.
1 Choose Diagnostics , Trunk Modules .
2
Choose a bus, and then choose a module.
3 Choose B channels .
A list of the B channels on this module appears.
4 Click a channel, for example, B 01
The display shows the status of the PRI channel.
5 On the Configuration menu, click Enable or Disable to change the setting for the channel.
Trunk module ports programming
Click on the Port XXX (where XXX is a port number) heading, located under Ports on Bus , to
access information about the state of the module ports. Each port maps to an incoming line.
Figure 38 Finding state of port on Bus