sundance-communications.com/forum Forums TDM Business Telephone Systems NEC Telephones & Systems MPLS Dropping calls

I have a customer who has recently been experiencing droped calls on there PRI/MPLS .The site is networked (3) Aspire M 7.32 calls are answered at one location and transfered out.The carrier is saying that the call is comming into the system and the PBX is sending the call back out before its being answered .The receptionist just get dead air. They did a trace on one call that was dropped. this what is said

I highlighted the callref code to show you where the calls change. These ids
indicate separate calls. Below we see the setup message for the call
example that they provided below. If you notice the call with the 0x3a62 id
you see the calling party number is 774.488.4307. 3 sec later you see
another call from the PBX being established ( 0x0803) to the customers
number from 774.488.4307. Then 10 sec there is a disco from the original
call id (0x3462). The PBX is redirecting the call for some reason. Plexus
sees "Plan:Unknown, Type:Unknown" in the setup message and will reject.


Q931 SETUP

IB to P BX (TX)

The we RX a Q931 setup

Jan 19 20:41:29.903 GMT: ISDN Se0/1/1:23 Q931: TX -> SETUP pd = 8 callref =
0x3A62
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98386
Exclusive, Channel 6
Facility i = 0x9F8B0100A117020117020100800F574952454C4553532043414C4C4552
Protocol Profile = Networking Extensions
0xA117020117020100800F574952454C4553532043414C4C4552
Component = Invoke component
Invoke Id = 23
Operation = CallingName
Name presentation allowed
Name = WIRELESS CALLER
Display i = 'WIRELESS CALLER'
Calling Party Number i = 0x2180, '7744884307'
Plan:ISDN, Type:National
Called Party Number i = 0x80, '2400'
Plan:Unknown, Type:Unknown


This is RX by PBX

Jan 19 20:41:32.847 GMT: ISDN Se0/1/1:23 Q931: RX <- SETUP pd = 8 callref =
0x0803
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98393
Exclusive, Channel 19
Progress Ind i = 0x8183 - Origination address is non-ISDN
Calling Party Number i = 0x2180, '4017222400'
Plan:ISDN, Type:National
Calling Party SubAddr i = 0x80, 'P3328'
Called Party Number i = 0x80, '7744884307'
Plan:Unknown, Type:Unknown
Low Layer Compat i = 0x8090A2
High Layer Compat i = 0x9181

And then they disco the first leg of the call

Jan 19 20:41:39.035 GMT: ISDN Se0/1/1:23 Q931: RX <- DISCONNECT pd = 8
callref = 0xBA62
Cause i = 0x8090 - Normal call clearing

A62 call ID

How is the call routing and was this working before? Has something been changed?

This system has been installed for about 5 years .
This recent problem started about a week ago .

They have 3 locations 2 of them have a 3 meg pipe with a pri hand of .the other site has a 1.5 pipe with a analog handoff .

from what they are telling me the calls are comming directly into the main site

A DID to a virtual extension ringing on 2 phones at the front desk .Then to AA if they dont answer in time but the calls seem to be dropping upon answering .very busy office

Thanks for responding

Hm, odd, have you tried resetting the system?

yes