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To configure basic T1/E1 controller settings to support PPP, High-Level Data Link Control (HDLC), or Frame Relay (FR),
follow these steps, beginning in global configuration mode:
Configuring Digital Voice
To configure basic T1/E1 controller settings to support PPP, HDLC, or FR, follow these steps, beginning in global configuration
mode:
Command
Description
Step 1
Router(config)#
controller t1/e1 1/0
Enters controller configuration mode by controller
number.
Step 2
Router(config-ctrl)#
clock source
{
internal
|
line
|
loop-timed
}
Configures the controller clock source for a DS1
link.
If the clock source is a network device attached to the
T1/E1 port that you are configuring now, select the
line
option. For any other clock source (either
internal or a network device attached to any other
port), select the
internal
option.
Note
The IAD2435 IAD supports only two clock
source options: internal clock source and
line clock source.
Step 3
Router(config-ctrl)#
description
line
Enters a description of the controller, such as the
destination or its application. The description can be
as many as 80 characters long.
Step 4
Router(config-ctrl)#
cablelength short
{
133
|
266
|
399
|
533
|
655
}
or
Router(config-ctrl)#
cablelength long
{
gain26
|
gain36
}
{
-15db
|
-22.5db
|
-7.5db
|
0db
}
Configures the cable length if the length is
655 ft (200 m) or shorter.
or
Configures the receive gain and transmit attenuation
if the cable length is longer than 655 ft (200 m).
Step 5
Router(config-ctrl)#
framing
{
sf
|
esf
}
If necessary, changes the DS1 link framing format.
The default is SuperFrame (
sf
).
Step 6
Router(config-ctrl)#
linecode
{
ami
|
b8zs
}
If necessary, changes the line encoding format for the
DS1 link. The default is
ami
.
Step 7
Router(config-ctrl)#
no shutdown
Activates the T1/E1 controller.
Step 8
Router(config-ctrl)#
exit
Exits controller configuration mode.
Step 9
Router(config)#
exit
Exits configuration mode.
Step 10
Router#
show controller t1/e1 1/0
Verifies the controller configuration.
Command
Description
Step 1
Router(config)#
controller t1/e1 1/0
Enters controller configuration mode by controller number.
Step 2
Router(config-ctrl)#
mode cas
Configures channel-associated signaling.
Step 3
Router(config-ctrl)#
framing esf
Configures framing.
Step 4
Router(config-ctrl)#
linecode b8zs
Configures line encoding format.
Step 5
Router(config-ctrl)#
framing
{
sf
|
esf
}
If necessary, changes the DS1 link framing format. The default
is SuperFrame (
sf
).
Step 6
Router(config-ctrl)#
ds0-group 1 timeslots
1-24 type e&m-immediate-start
Configures the DS0 group.
