UC500 with SIP Trunking, CODECs and transcoding question with CUE
I'm looking to deploy UC500 in a customer site and SIP Trunk to a SIP Service Provider. I wish to use G729 for all calls over the SIP trunk where possible.
It's my understanding that CUE only supports G711. Therefore is it possible to transcode locally on UC500, in which case how many transcoding sessions are available on the UC500 products? I won't be using any of the analogue ports so no DSP's will be used for normal calls.
Alternatively is it possible to re-negotiate CODECs so that when a call comes in on the SIP trunk and is sent to the Auto Attendant on CUE it uses G711, but in the case where this same call is then sent/transferred on to an IP Phone it then uses G729. And also for the opposite where a call comes in on a SIP trunk and is answered by a phone using G729 and then transferred to CUE/VM and changes to G711.
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...