TANDEM SIP TO E&M

[morenot]

Hi all:

We have this scenario: BCM400 4.0
BCM2---T1E&M---BCM1---SIP--MPLS NET TO ANOTHERS BCM

When I dialing from BCM1 TO BCM2 is working and viceversa.
but, when anybody dialing from another BCM from MPLS net
to BCM2, the call rings two times and drop,the caller get on display " NO ANSWER 18", if the call is answered before 2nd ring, is completed ok
If the call is to BCM1 it´s ok

Any ideas?

Thanks....

 

[kungfumstr]

Problem Description
Two Business Communication Manager (BCM) 400 4.0s are connected to each other over Session Initiation Protocol (SIP) trunks as shown below.

Public Switched Telephony Network (PSTN)<---------->PRI-BCM1 <----------SIP trunks------------>BCM2


In this scenario, BCM2 is using the PRI module on BCM1 for PSTN calls.

Calls can be made between BCM 1 and BCM 2. BCM 1 can make local and international calls using the PRI lines connected to it. BCM 2 is able to make local calls using the PRI connected to the BCM 1 by means of the VoIP lines.

However when anyone tries to make an international call using the PRI connected to the BCM 1 by means of the VoIP lines - the call drops and gives an error: NO ANSWER, 18.

The PRI protocol is ETSI Euro which is highly important in this specific scenario, as this will change the attitude about the digit manipulations on the tandem calls .
Problem Resolution


When customer sets the type to Service and uses ETSI Euro PRI protocol, then the corresponding route which is used for PRI access on BCM 1 should be configured as service type Overlap instead of None as shown below. This resolves the issue

 

[morenot]

Thanks kuungfumst for you answer

The problem was resolved..
I had change the T1 for PRI and work...