HP ProCurve Secure 7000dl Series Basic Management And Configuration Manual page 199

Configuring E1 and T1 Interfaces
ProCurve Secure Router 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]
By default, the speed for channels is 64 kbps, and this setting will be used for
all E1-carrier lines and most T1-carrier lines. The speed 56 setting is used
only if your public carrier is using a 56 Kbps setting for the connection. In this
case, your public carrier will tell you to set the speed for each channel to 56
kbps. For all other environments, you should simply accept the default setting
of 64 kbps.
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