sundance-communications.com/forum Forums TDM Business Telephone Systems Comdial Telephones & Systems DX-120 PRI issue

Can I get some advise? I have a customer with a DX-120 and a PRI that ran great for two years under telco A. Three weeks ago we swapped over to telco B and ever since I have had an issue we cant resolve. I have spoke with tech sup and they had me upgrade the software and PRI chip but it did not fix the problem. Spoke with telco B today as they ran test and they say its not them.

This is the problem: incoming call to a DID, rings and routed perfect. The caller ID sometimes only shows part of the name. Example: call comes in from walley world. It may say (walley world), it may say (ley wor), it may say (ey w), etc. Im going to call tech sup again on Thursday, but i though I would try runing it by some others first.

Any ideas?
Thanks

Well, as always---a system runs fine for two years and a telco change is made and they say that it must be the CPE. I'll never, ever understand that kind of logic.

Deltron is the moderator who has hundreds of PRIs on DX120s.

Also, search PRI here in the Comdial forum. He has put out a lot of info on this subject.

When i spoke with the telco, they said its set to national standard. Im set to national esf. The manul says with PRI set the t1 to sf. Reading some others threds, the telco should be 5ess? What is the standard protocal for the dx? I have a few other dx120's with PRI and they are plug and play with AT&T?

Jim, I've had this happen time after time. Fortunately in every single case it's been quite easy to tell the customer it worked perfectly before we switched so it is in fact a carrier issue. Of course the carriers despise this, especially when we break the contract and tell them to take a hike.

The CID issues are a dead giveaway the carrier has a problem. Make sure they've flagged the D channel as data only. If you're running off a soft switch, especially if it's dynamic, chances are you are going to have problems.

Tech support always says to upgrade to the latest software/firmware but it rarely resolves the issue. You're in a bind and the only real solution I can think of is insist to the CLEC they have an issue and if they don't resolve it you're sending them down the road. The system worked correctly for 2 years and now it doesn't Obviously they are not following precise standards for a PRI circuit. For what it's worth I've never had a single problem with any software or firmware behind a #5ESS switch.

Something that bothers me about your post is the CID errors but routing works correctly. I've never seen CID issues without routing issues. The D channel provides both the CID information and routing. Errors on one should go hand in hand with errors on the other. Not only that I've observed outgoing calling errors when the incoming is screwed up. I'm assuming the carrier has the PRI set as NI2. Make sure it isn't flagged as ATT or NTP.

Let us know what happens.

--Bill.

B8ZS, ESF only.

Bill thanks for the info. I will contact the co and tell them to set us to 5ess. Thanks very much.
Jim

I think he means a 5ESS CO. With the soft switch you alwasy have strange issues. When it is on a 5ESS switch no issues. However good luck trying to get carrier to put you on a 5ESS. Most of them do not have them because they cost to much. It is a strange business we are in.

Jim

OK, Telco says my choices are national or custom. Now what? Does anyone else get frustrated dealing with telco's and there need to be unflexable with the public? I understand they want one seting for everyone, less work for them. If custom is not an option, I will tell the customer:
1- I will replace the system.
2- If it fixes the problem - NC and I will send the system to Vertical.
3- If it does not - a big fat invoice will be in the mail.

one more question about the 5ess, I was reading it does not support name caller id. is this true?

PRI supports name and number, T1 is number only.