atcomsystems.ca/forum Forums Other TDM Phone Systems Executone-Isoetec Telephones & Systems 228 T-1 problems

Hi, I have a 228 dropping outbound calls over T-1. Under the diagnostic screen there are no slips no alarms, the T-1 provider has put in a fresh circuit same problem. I have changed all the cards and the cabinet out, also the CSU. This is a 2.5.1 ACPU.

Any suggestions?

Can you get ahold of a TBIRD? You can also have Telco monitor circuit onsite with a TBIRD. Double check all your line settings (line type, data type, drop pulse, etc.)

Good Luck!!

You can also try changing the drop pulse up to 20 , it cant hurt and I have seen it work on the IDS T1.
Rick

Thanks, they have put in a new T1 so that takes care of the carrier. I did adjust the drop pulse, no change. Could it be the line type? Right now they are tie lines should I change them to DA_1 or 2? I am going out there and switching out the EVCM so we will see if that works. This is one of the most frustrating problems I have ever had on an Executone.

How long does the call stay up? Does it actually connect? Your carrier should be able to pull a CDR and see the direction of the disconnect. If you are set as immediate start and the carrier is wink you will see the wink as an on-hook/off-hook and disconnect the call

I went to change out the EVCM and CRASH hard.
replaced the whole system and cpu...long day.
After test calls I got one of their line release's dialed a long distance phone # and I got a busy, called it right back and it connected. Checked the T-1 diagnostic screen no slips no bpv's. The T's are grabbing the last channel and checked system for any power spikes, took out the Oneac power conditioner, and played around with the clocking cables so lets see what happens.

Forgot to shut system down before changing EVCM?

Nope, did a shutdown, the cpu crashed upon power up.

Update: Found in the line utlization reports that I have a lot of Disconnect Supervisons on these long distance T's. Looks like the carrier is dropping the calls and the 228 then dissconnects them over 30 to 40 a day.

So we will see how the carrier worms out of this one.

The old ACPU's would crash on bootup if the eproms where not seated all the way properly, and the processors where not soldered onto card. You can try seating all the chips and CPU might work again.

Good catch on your side!!