atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Telecom Service & Providers Analog trunks-half Duplex

We are having an issue with or analog trunks coming from the CO. Well, I believe it's an issue is with the trunks.
When we call out through any analog trunk, the call connects fine but when talking to the customer then conversation is like we are talking on half deplex devices. Only one person can speak at a time, because if they talk at the same time one person will get cut off.
Could this be a telco issue, because when we call inter office the calls are fine and if we route calls out another site's trunks from the site in question the calls are fine. So the one thing in common with this issue is the analog trunks.
Is there anything I can suggest to Telco about fixing this. They did come out and replace something at the demark and that didn't help.

What kind of trunks and what kind of service?

They are suppose to be POTS lines.

I've never heard of this problem on POTS. If this is all calls to all customers and you have the same problem from the DEMARC with a butt set, just report to the LEC. If this is just to one particular customer they may have a switch problem or are not using POTS for service.

The only thing I can think of that may cause this problem on POTS is if you're being served by a local carrier due to lack of cable pairs.

I guess that is one thing I didn't do is test at the Demark, I'll give it a try.

Also the lines might have had some sort of Centrex service on them at one time or another. Be the Telco reprovisioned to POTS, if they missed something on the conversion could that create this issue?

Centrex is nothing more than an off prem PBX service I can't think of anything that would cause your problem by simply removing the Centrex features.

What phone system you are using? Are you talking about been cut off on speaker or regular handset? If this is regular handsets then most definitely you are connected to IP switch at provider's side.

The site phone system is IP (shoretel) which has no issue what so ever with connecting to loopstart trunks. Yes it is the handset and when connected to a customer on the outside, any noise or both talking at once one of the calls will get muted.
You ever run into this before?

Well guys could this be "talker cut off" carrier trouble?

Jim,
talker cut off?????