Loopable CSU/DSU

[rflanary]

My provider AT&T keeps telling me everytime i call with a problem that they cannot loop my csu. It works if i push in the Loop button on the T1 WIC. This is a cisco router with a T1 wic card.

Is there something in the cli that i can do software wise?

 

[burtsbees]

test int whatever

Burt

 

[burtsbees]

Edge#test int fa0/0
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Passed
1 interfaces: 1 passed, 0 failed, 0 skipped, 0 untestable
Edge#

Burt

 

[rflanary]

should i not have a loopback interface?

 

[vipergg]

Pretty sure you can put the csu into loopback with a CLI loopback command . We have even put external modems into loopback from the router command line , of course your modem has to support it to do that . This might help.

http://www.cisco.com/en/US/customer/docs/ios/12_2/12_2z/12_2zl/feature/guide/t1dsu.html#wp1032873

 

[plshlpme]

so this card is a T1 wic with a built in CSU ie Wic1-DSU.. not a Wic-1T.

if so then it should accept loopup commands from the telco..
if they issue a csu loopup from their testhead there is no reason it shouldnt loop.

you would see the csu test light or loop light turn on the same way it does when you push the button.

does the telco have a smartjack or some other loopable device on prem that they are able to run to?

 

[rflanary]

Yes there is a smart jack at each site. The telco can loop there smartjack but can not loop my CSU. It works when i hit the loop button but not without it. I was thinking maybe there was a command that i was not using. Oh well. I just have to put up with them.