Definity G3 CO trunk lines in disconnected state

[master350z]

Our users are trying to call out then most of the time get dropped. They here three beeps when dropped (ring back queuing). I found the the Trunk group for the CO is only running 2 of the 10 lines in an active state. Things i have tried are swapping out the TN474 card with another, all 10 where active for awhile then dropped back to 2 again. Rebooted. I put an analog phone on the CO lines, all 10 powered the phone. Can someone please point me in the right direction to get these other lines up?

Definity: status trunk 11 (page 1) 6/2/2016 2:56:03 PM
TRUNK GROUP STATUS
Member Port Service State Mtce Connected Ports
Busy
11/01 01A1501 disconnected no
11/02 01A1601 disconnected no
11/03 01A1503 disconnected no
11/04 01A1504 disconnected no
11/05 01A1505 in-service/idle no
11/06 01A1506 disconnected no
11/07 01A1605 disconnected no
11/08 01A1507 in-service/idle no
11/09 01A1508 disconnected no
11/10 01A1608 disconnected no

 

[joe2938]

Are you sure these are all ground-start lines, try changing to loop-start, then busy and release and then status the trunks

 

[master350z]

Yes. This just started happening. Ive seen a PBX guy use his test set and use the ground wire when testing the lines a few years back. He told me they were ground start. The config on this pbx has not changed in 10 years.

 

[joe2938]

ya but things can change, I would verify that they are still ground-start lines, check with your line provider to be sure

 

[master350z]

I put in a ticket with ATT to have the lines checked. Thanks Joe. I'll let you know something soon.

 

[Saiyan656]

You need to touch ground to create dial tone on ground start line for DT? If you didn't have to do this when you test analog phones then you have change to trunk type to loop start lines and try that.

 

[joe2938]

that was already said

 

[master350z]

Thanks guys. ATT fixed the downed 8 lines and everything is working now.

 

[joe2938]

Just as I suspected, glad it's fixed!