I've successfully implemented interop between Skype for Business (Lync 2013) and our Cisco video conferencing environment. I'm having one issue sorrounding presentation from a Skype endpoint to a Cisco endpoint. Every time I try to initiate a presentation from Skype, I get a response code of SIP/2.0 503 Transcoder resources unavailable on the Skype side. It doesn't matter whether I utilise an MCU to bridge the call, or I go point to point. Presentations from a Cisco endpoint to Skype work a treat.
Is this a known limitation of this interop? I can't seem to find anything to indicate it is.
My environment information: Endpoint tested: MX300 & SX20 (7.3.3) VCS-C: X8.6.1 (encryption, internetworking, findme, device provisioning and Microsoft interoperability option keys) In the B2BUA, RDP transcoding is enabled. TMS: 15.0.1 MCU (5310) (when used): 4.5(1.72) - conferences are set to "Hybrid" for the content mode, with auto codec and no minimum outgoing bit rate.
Anything else I should take a look at? Sorry if I've missed any key info.
I've managed to sort this out. I had to add the VCS as a transcoder in Applications > B2BUA > MS Lync > Transcoders then set "Enable external transcoders for this B2BUA" to "Yes" in ... MS Lync > Configuration.
I was not required to enable transcoder policy rules.
This is strange, I thought with the 8.x releases of VCS-C software they supported this by default (with the MS interop option key). I was under the impression the transcoder settings were for the Cisco AM Gateway.
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