dzembek

Hello,

We have a Nortel Option 11 connected to a PRI. We are finding certain inbound calls (to xxx-x376) are not being connected - they are being dropped immediately. If those same callers dial another # on our PRI (xxx-x060) they get through just fine.

The difference is that the 376 calls are being routed across a TIE into a another PBX, while the 060 calls are terminating at the Nortel PBX. Majority of incoming calls to 376 are completing just fine, it's just these few (that we know of so far) that are having problems calling us. We're pretty sure we can side-step the problem by terminating the calls at the Nortel box and use a menu to then transfer the calls across the TIE, but this is not how we 'want' to do it.

We were told by our carrier that it may have something to do with the type of call signalling being sent. Supposedly we're seeing the problem with 3.1KHZ calls vs. 64KHz calls?

I saw a few references to this type of problem on the web with regards to ISDN, but nothing concrete.

- One mentioned ensuring DSEL was set to 3VCE
- One mentioned that some PBX's can be configured not to accept these types of calls and another said that the carrier can configure not to accept these types of calls.

My local Nortel folks have been working hard to resolve, and I know I haven't provided a lot of info here, but I was curious if anyone else had run into anything like this before?

Thanks!