4-14
Configuring E1 and T1 Interfaces
ProCurve Secure Router Modules
E1 Channels. When you configure an E1 module with a built-in DSU, you
must configure the number of channels that the E1 WAN connection uses. You
can configure channels 1-31. One channel—channel 0—is used to maintain
the connection and cannot be used for data or voice.
If you purchase an entire E1-carrier line, you configure channels 1-31. If you
purchase a fractional E1-carrier line, your public carrier will tell you which
channels to configure for that connection. (If you want to use some of the
channels for voice, see
Chapter 9: Configuring the E1 + G.703 and T1 +
DSX-1 Modules
.)
T1 Channels. When you configure a T1 module with a built-in CSU/DSU, you
must configure the number of channels that the T1 WAN connection uses. If
you lease an entire T1 line, you configure channels 1-24. If you lease a
fractional T1 line, your public carrier will tell you which channels to configure
for that connection. (If you want to use some of the channels for voice, see
Chapter 9: Configuring the E1 + G.703 and T1 + DSX-1 Modules.)
Configuring the Number of Channels. To configure the number of
channels used for an E1 or T1 WAN connection, you use the tdm-group
command:
Syntax: tdm-group <number> timeslots <range of numbers> speed [56 | 64]
This command creates a TDM group and assigns it a number of channels.
Replace <number> with a number between 1 and 255, and replace <range
of numbers> with the channels that will be used for this connection.
The TDM-group number relates directly to the interface that you are config-
uring. This means that you can create a TDM group 1 for each E1 or T1
interface on the ProCurve Secure Router.
You enter the tdm-group command from the E1 or T1 interface configuration
mode context. For example, to configure the E1 1/1 interface to use all 31
channels, enter:
ProCurve(config-e1 1/1)# tdm-group 1 timeslots 1-31
To configure the T1 2/2 interface to use all 24 channels, enter:
ProCurve(config-t1 2/2)# tdm-group 1 timeslots 1-24
Speed Option. If you view the syntax for the tdm-group command from the
CLI, you will notice that it includes a speed option, as shown below:
Syntax: tdm-group <number> timeslots <range of numbers> speed [56 | 64]
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