Configuring The T1 Interface For Data Communications; Assigning Channels - HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual

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Configuring the E1 + G.703 and T1 + DSX-1 Modules
Configuring the T1 + DSX-1 Module
N o t e
9-14
other public carrier equipment used in a T1 connection, see Chapter 4:
Configuring E1 and T1 Interfaces.) You connect the DSX-1 interface to the
PBX, using a crossover cable with an RJ-48C connector.

Configuring the T1 Interface for Data Communications

The first step in configuring the DSX-1 drop-and-insert module is to configure
the T1 interface that will handle data. Two settings for the T1 interface directly
affect the DSX-1 interface:
channel assignment
clock source

Assigning Channels

When you configure the T1 interface, you assign it a certain number of
channels that will be "nailed" to that interface. By default, any channels that
you do not assign to the T1 interface are passed to the DSX-1 interface.
A T1-carrier line includes a total of 24 channels. When you divide these
channels between the T1 interface and the DSX-1 interface, you must create
two groups of contiguous channels.
For example, you could assign channels 1-12 to the T1 interface. Channels 13-
24 are then automatically assigned to the DSX-1 module. To assign channels
to the T1 interface, move to the T1 interface configuration mode context and
enter the tdm-group command:
Syntax: tdm-group <number> timeslots <range of numbers>
ProCurve(config-t1 1/1)# tdm-group 1 timeslots 1-12
If you view the status of the T1 interface (after you configure a logical interface
and bind it to the T1 interface), you will see that channels 1-12 are marked
with an N. This means that they are "nailed," or assigned, to the T1 interface.
The channels assigned to the DSX-1 interface are marked with a D. (See
Figure 9-4.)
If you have not yet entered a bind command to bind the T1 interface to a logical
interface, the channel assignments will not be displayed correctly.

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