sundance-communications.com/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems DCS & DID trouble

I have a situation with a client where they recently switched to a new carrier (US LEC)!Everything is coming out of a channel bank. Well ever since, they have had problems with sporatic call drops. Really no pattern to what happens but if it drops it usually does within the first 30 seconds call just drops. This is a older dcs 2 cabinets and those 1-way did's are analog on a 4 port did card. Now I have even put in another card trying different slots and still the same problems. Also US SLACK says they changed out the channel bank but I'm not totally sure this is fact. They keep telling my client it's my problem in the switch. Bull$*%@ I say it worked before you guys cut over. Now they are trying to get my customer to kick out and get a t-1 card and try it that way! What should I do??

By the way samsung tech support also said they believed it to be a carrier issue. Customer is getting real upset with everybody! He does not care who's at fault just wants it resolved. Anybody ever had these issues with that system and analog did's?

What is the monthly difference in price between a T-1 and the lines he has now that are DID and regular both way trunks? If reasonable, just do it.

Call the switch technician and put a monitor on the circuit and see what is going on, have they done that?

It most likely is a carrier issue. I have several Adtran 750 units here and if you pay the shipping both ways you could borrow one and see if that helps. Realisticly, the channel bank most likely is not the problem.

I had exactly what you are describing when I had a customer on Universal Studio lots. I swapped T-1 cards and cabinets and PacBell just kept blaming me. One night I cleaned the stickers off the multiple NIU box and saw lights going on and off, orange to red for a brief time and called PacBell.

The hi-cap supervisor ranted that I was blowing smoke at him and I didn't know what I was doing and finally just to humor me placed a monitor on the circuit.

Five minutes later he called back very sheepishly and asked if I could stay while they did a dispatch. Problem PacBell sir? Yes, he admitted, "The circuit took 3000 hits since we put it on, it is our fault." Get these guys to put a monitor on the circuit.

What is the monthly difference in price between a T-1 and the lines he has now that are DID and regular both way trunks? If reasonable, just do it.


Sorry I may have confused you! The lines are coming out of a t-1 through a channel bank , which this was the exact same setup as previous carrier(nuvox).They have 12 lines of POTS and 4 DID trunks and the rest of the channels are data. They want me to put in a T-1 card in the system and they will provision those did channels out of the bank through a quad t-1 card coming off the carrier access adit to see if that corrects the problem! The pots lines work just fine by the way. That was the first thing I asked about Monitoring the circuit. They told me that they did that and can see from their end that it's the DCS dropping the call! I would have to see it to believe it!I'm out of ideas but I don't think I should have to kick out for a t-1 card when this setup should work! I mean I've even went as far as defaulting the whole system changing did cards different slots and no dice! Any other suggestions?

What software do you have? 4.8?

QUOTE: The pots lines work just fine by the way.
Well what lines are dropping, I'm confused?

Or, you could go back to the old carrier.

I could loan you a T-1 card, (have several), and they could reconfigure the switch after business hours, but I don't know what lines are dropping if the pots lines are fine.

Best suggestion: More explanation.

Only the DID calls are dropping, I'll double check software revision. Intermittantly drops DID calls, no pattern except if the call drops its within the first 30 seconds of the call. Sorry after I reread my post it is a bit confusing.

I have DID cards you could borrow, have never installed one, several came with a system I bought.

At least you would know that it is not the card.

Before that, have the people who get DID calls note the line they are on and if it drops, note that.

If all the drops are on 713 or 714 or 715 or 716 then you have narrowed it down to one port on the card or one port on the channel bank.

Have them move the DID trunks to 21, 22, 23 and 24. This will prove it is not the channel bank.

Yeah I tried a brand new DID card in another slot but still the same deal. It does drop calls on all 4 DID channels also.I will get them to move to other channels on the bank too, last thing I know to try besides a t-1 card.They do claim they changed the bank out but I don't think this is the case. We've been asking callers where their calling from as soon as they answer just for grins. Almost every call that comes from outside our area code 704/980 the call drops after about 20-30 seconds.No local calls seem to drop! The weird thing is today one guy called from 954 area code and the call dropped, called right back and had a 25 minute conversation. It appears to me that the carrier is at fault(IMHO). Customer is going to switch back and I hope like hell this problem goes bye bye! Old blond hippity hopping Bunnie, I thank you for your help and kindness! You won't ever know how much that means that someone I don't know from Adam would let me borrow equipment to help me out and in a bind!I'll let you know what happens. You ever need anything let me know,Thanks. Charles