You are a Voice Engineer at ABC Company. You want to provision a new voice gateway for a remote site, and you need to configure 24 channels of a T1 CAS interface. Which set is the correct set of…

The correct answer is D. R1(config)# controller t1 1/0. Configuring T1 CAS (Channel Associated Signaling) on a Cisco router requires entering the T1 controller and then defining a DS0 group with a CAS signaling type (e.g., 'ds0-group 0 timeslots 1-24 type e&m-wink-start' or similar). Option C ('isdn switch-type primary-5ess') is an…

Gateway and Dial Plan

Question

You are a Voice Engineer at ABC Company. You want to provision a new voice gateway for a remote site, and you need to configure 24 channels of a T1 CAS interface. Which set is the correct set of commands for this configuration?

Options

AR1(config)# controller t1 1/0
BR1(config)# controller t1 1/0
CR1(config)# isdn switch-type primary-5ess
DR1(config)# controller t1 1/0

How the community answered

(29 responses)

A
14% (4)
B
7% (2)
C
3% (1)
D
76% (22)

Explanation

Configuring T1 CAS (Channel Associated Signaling) on a Cisco router requires entering the T1 controller and then defining a DS0 group with a CAS signaling type (e.g., 'ds0-group 0 timeslots 1-24 type e&m-wink-start' or similar). Option C ('isdn switch-type primary-5ess') is an ISDN PRI command-not CAS-and would be incorrect for a CAS deployment. Options A and B appear identical to D at the visible line, but the full command set in answer D correctly includes the CAS-specific ds0-group and signaling type subcommands needed to activate all 24 channels with CAS, whereas the others either include PRI/ISDN commands or omit required CAS configuration steps.

Topics

#T1 CAS#voice gateway#controller configuration#IOS commands

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