I have a project, which is integrating Cisco call manager PBX with the following PBXs
1. Siemens HiPath 4000 Ver 2.0
2. Avaya S8400 Communication Manager version 5
3. ALCATEL 4400 WM1, The CPU is CPU3 with software version R3.2
4.SIEMENS ATEA, OMNI-230,Version X185
5.SIEMENS, HICOM 300E, software version1.
6. NORTEL NETWORKS, OPTION 61C, X11(SOFTWARE Version)
all of them in remote sites except the first two pbx (hipath and avaya) they are localted in the same datacenter of the cisco call manager.
I need your recommendation. for which one should I go for SIP? QSIG with E1?
I need your advice in this and if there is a useful documents, I checked in cisco they have.
but i am tryin got find a way to connect them through SIP using IP, not using E1 line.
for sure i will use E1 line if it is the last option i have
thanks in advance