call forward problem between 2000ips's

[dd555]

I have a 2400ipx and 4 2000ips's with IP trunking,point to multipoint. calls made from 3 of the 2000's to i'll call it site A also a 2000 that are forwarded to the 2400 and answered are disconnected after about 50 sec. calls from Site A to the 2400 no problem, or from site A to any other site no problem. calls from Site A to any other site forwarded to the 2400 works fine.calls from the 2400 to any site work fine.
I had a local vendor look at it and no luck. All the 2000 programming looks the same. 2400 also uses the same route for all sites. the only thing we have noticed is all sites except site A are on 100Meg ports on the router, Site A is 10 MEG. I didn't think that should be a problem. Any Idea's anyone?

 

[pave35]

Did the vender trace the call to determine who tore down the call? A simple etherreal trace would show this.
I would check ACIC1 in the 2400 and make sure it is set for all the point codes of the 2000 sites.

 

[dd555]

checked acic1 looked ok. Calls to an ext. in the 2400 from site A work fine. It is only on a forward condition on a call from one of the other 2000's that the disconnect occures. Does any timer come into play after a call is completed it cuts off at 50 sec from the time the call is answered. Calls from any of the sites to the 2400 directly work fine.

 

[pave35]

If ACIC1 is 100% correct then you'll have to go back to the trace to see what is going on.
Your vendor should have done this or at least called NEC for trouble shooting direction.
If you don't have an NEC associated vender (someone who is certified and can call NEC without paying) you can find one at

http://www.necunifiedsolutions.com/main/FindReseller/FinFindAReseller.asp?