NO Chan Available

[Bitonti]

Customer says once and a while when she dials 9 she gets “No Chan available”. I’ve replaced the DTM card, I’ve run a 2 day test on the PRI and received no errors. Last night we performed 8 - 10 calls on each individual channel by putting them in make busy state and only allowing 1 channel IDLE at a time, and all 23 channels are testing good. I managed to busy up all channels on the PRI Making them go into CPB state from the BCM and made further test calls and was getting "NO FREE LINES" on the set. When I went for an outside line I was NOT Getting "No channels available" as the customer had stated. The test center brought down the "D" channel and I was getting “no free lines available”. I then tried to unplug the PRI from the DTM and never once did I get "No channels available" like the customer stated. With all the testing done we have not been able to duplicate the scenario stated by the customer. Yes I have checked my clocking. Only thing I could think of changing out would be the PEC cards. O and this error has been occurring when there are very few people in the office. Like late on Friday or early mornings. This is occurring on all sets at all different times of the day.

 

[3Sixty]

What version of BCM?

There was a few problems on 3.5 and a patch supplied by Nortel.

 

[Flatts]

You didnt say if you checked with the PRI provider. Or it could be a version issue also.

 

[jdavid99]

make sure you are set to Asending on your PRI settings. Default is desending and that is usually what the CO default is too. when they are the same it causes collisions.

 

[Bitonti]

My company is the PRI provider. All good in that area. It's a BCM 400 3.6. With all the upgrades.

 

[Bitonti]

The biggest question is how to get the BCM to say "No Chan Available" If we can get it to do that it should be no problem to solve the problem but I cant do it.

 

[atcom]

I have a customer getting the same message. No resolution yet.

 

[AlquestTech]

That sounds like A PRI message from the Provider (You) That does not sound like BCM message. Which would mean there was a problem with the PRI at the time and not the DTM.

 

[Bitonti]

We'll after months I figured it out. What I found was a bad punch. When we put a pri test set on it tested 100%. I think every time someone went into the main phone room and slammed the door it would move the wires just enough to disrupt the pri channel. When I pulled the jumper off it actually fell off without having to pull it off. I punched it down again and I haven’t heard back from them.
Check you pairs, pull them off and re-punch or even change the pairs all the way upstairs.
Worked for me hopefully it works for you. Good luck.
Again I tested the pri myself for 2 days and found no faults this is the only thing that worked.

 

[AlquestTech]

Thanks For sharing!