Hi All,
I am trying to establish communication between CUCM 8.6 and Siemens HiPath 3800 using SIP trunk. I have tried to follow the document 'Siemens HiPath 4000 Release 5.0 using SIP trunk to Cisco Unified Communications Manager 8.5' from Cisco Interoperability portal.
http://www.cisco.com/en/US/solutions/collateral/ns340/ns414/ns728/ns784/984209.pdf
When I call from CUCM to Hipath and vice versa, I hear a silence for 15-20 seconds and then the call drops (or retry timeout expires). Any idea?
