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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:

Command

Step 1

Router(config)# controller t1/e1 1/0

Step 2

Router(config-ctrl)# clock source {internal | line |

loop-timed}

Step 3

Router(config-ctrl)# description line

Step 4

Router(config-ctrl)# cablelength short {133 | 266 |

399 | 533 | 655}

Router(config-ctrl)# cablelength long {gain26 | gain36}

{-15db | -22.5db | -7.5db | 0db}

Step 5

Router(config-ctrl)# framing {sf | esf}

Step 6

Router(config-ctrl)# linecode {ami | b8zs}

Step 7

Router(config-ctrl)# no shutdown

Step 8

Router(config-ctrl)# exit

Step 9

Router(config)# exit

Step 10

Router# show controller t1/e1 1/0

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

Step 1

Router(config)# controller t1/e1 1/0

Step 2

Router(config-ctrl)# mode cas

Step 3

Router(config-ctrl)# framing esf

Step 4

Router(config-ctrl)# linecode b8zs

Step 5

Router(config-ctrl)# framing {sf | esf}

Step 6

Router(config-ctrl)# ds0-group 1 timeslots

1-24 type e&m-immediate-start

Description

Enters controller configuration mode by controller

number.

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.

The IAD2435 IAD supports only two clock

Note

source options: internal clock source and

line clock source.

Enters a description of the controller, such as the

destination or its application. The description can be

as many as 80 characters long.

Configures the cable length if the length is

655 ft (200 m) or shorter.

Configures the receive gain and transmit attenuation

if the cable length is longer than 655 ft (200 m).

If necessary, changes the DS1 link framing format.

The default is SuperFrame (sf).

If necessary, changes the line encoding format for the

DS1 link. The default is ami.

Activates the T1/E1 controller.

Exits controller configuration mode.

Exits configuration mode.

Verifies the controller configuration.

Description

Enters controller configuration mode by controller number.

Configures channel-associated signaling.

Configures framing.

Configures line encoding format.

If necessary, changes the DS1 link framing format. The default

is SuperFrame (sf).

Configures the DS0 group.