I have an issue with a Nortel to Cisco integration - we have a Nortel option 61 and we are trying to move voicemail over to a 3rd Party voicemail box (Interactive Intelligence) that sits on the Cisco side of the house. Call flow is as follows:
call comes into a Cisco VG2851 using MGCP.
VG sends call across network from MGCP GW to an H323 GW that has a PRI trunk using DMS100 signaling into Option 61. DMS100 is the only way we can get redirect info which I believe is what we need to see.
If Nortel handset rings out cfna sends call back to Cisco side with the called party number being the voicemail pilot. The issue is that when the calls gets sent back to the H323 GW with a redirect number of the handset it does not route back to the Cisco side but unfortunately just redials the Nortel handset over and over. If we configure the Cisco to Nortel trunk as NI or QSIG we do not get redirect info but the call does route to the voicemail server but does not ring into the handset voicemail box as it sees the call coming from the original calling party number. If anybody has any experience integrating this as such any information or advice would be appreciated. The proper dial peer info is in place because it does get routed properly using NI or QSIG.