Forgive my ignorance but I am trying to understand the various communication channels that are set up in a scenario:
A customer has a CallManager 3.3x cluster, various 7960 IP Phones and IPCC spread over about 7 servers. Apparently everything has been set up correctly and IPCC is correctly distributing calls using the IPCC scripts that have been developed for them. The various Contact Centre PC's have SoftPhone installed and the customer is experiencing an intermittent problem where the softphone application will not allow calls to be transferred (the buttons are greyed out). The only solution is to re-boot the 7960 IP Phone; re-loading the application or re-booting the PC doesn't fix anything.
I would like to know how the various communication channels operate as I assume the SoftPhone application is speaking to both CCM & IPCC, plus the IP Phone will be have a TCP (SCCP) connection to CCM and when a voice call is active to either a Gateway (MGCP) or to another IP Phone possibly?.
The problem has been ongoing for a while and the actual cause hasn't been identified, so it could be anything from the network to the applications.
Please assume the network is setup OK and there aren't any congested links or dropped packets.
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