Hi,
One of our customer needs SIP trunking services. Cuurently they have 3 different Legacy TDM PBXs & is willing to use existing PBXs rather than moving to IP PBX. How can we acheive this?
Option 1: TDM PBX ---->QSIG--->Cisco ISRG2 Gateway (H.323) ----> SIP -----> SIP Service provider network
Option 2: TDM PBX ---->QSIG---> H.323 On Cisco ISRG2 Gateway ----> SIP on CUBE (same ISRG2 running H.323 GW) ---> SIP Service provider network
Which option is suitable???
As far as i know, Option 1 will suffice since there is no IP PBX and TDM doesn't understand IP so gateway will take care of everything and CUBE licenses are not needed. QSIG --> H.323 --->SIP signal conversion and transcoding can be taken care by gateways itself.
Is my understanding correct and we can go with Option1 or not?? What other consideration needs to be taken or we should go with Option 2??
Secondly if i am choosing option 2 and running CUBE & Gateway both on same router, do i need to consider CPU utilization also. E.g. Cisco 2901 supports 100 SIP sesions and if i need TDM - IP conversion also for 80 sessions, will there be any effect on CPU utilization or i just need to put CUBE licenses and CPU utilization will not have a considerable impact.
I was going through the Gateway section of SRND but i found the information a bit ambigutous to conclude for solution
