i have a Cisco router acting as a voice gateway with two ISDN connection: 1)E1 connection that is to be used for all calls "inbound/outbound" 2)SIP trunk connection to the TELECOM just for incoming calls to specific extension "DN" . My CUCM is connected to my gateway using H.323. My E1 connection is work fine but my incoming sip calls does not working properly.
for the incoming calls on sip, I am getting no ring back. The call flow is as follows:
PSTN-->SIP Line-->GW-->H.323-->CUCM -->Translate to extention "DN"-->extension rings but from the PSTN side no ring back is heard.
please help me and tell me what should i do to solve this issue?
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