I'm in a bit of a jam. I've got a carrier that only supports sending either rfc2833 or plain g711u inband. I've been told from the uccx TAC that the only dtmf methods supported on uccx are a subscribe/notify model like RFC6665 ('dtmf-relay sip-notify' in a cube or other cisco mg) or KPML Events (like RFC4730, 'dtmf-relay sip-kpml' in a cube/mg).
As far as I know, our SBC (an acme netnet 3820) can only translate rfc2833 events to SIP INFO events. I've got a support case open with them just to confirm, but my expectations are low.
It looks like my only option is to use an MTP on that carrier's trunk in cucm.. But that's not very appealing from a survivability standpoint.
Does anyone here have any experience running into this? Do you have any other workaround suggestions that don't involve me buying a cube or switching carriers ?
Turns out Acme added an option called "kpml-interworking" in scx 6.4.x (we happen to be running a version behind). Looks like I can upgrade and enable kpml-interworking on the sip-interface for callmanager.. then we should be okay.
The session-agent(s) and sip-interface that were associated with cucm were changed to kpml-interworking enabled. kpml-interworking was set to disabled on the SA/SI sides facing our carrier, and rfc2833-mode on that SA was set to preferred.
I also turned on translate-non-rfc2833-events in the media-manager just for good measure, but toggling it doesn't seem to make any difiference.. so I might end up turning that back off.
Either way, I'm working now without an MTP, using rfc2833->KPML events
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
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 ...
This document describe how DST changes and how time changes are
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setting the clocks forward 1 hour from standard time during the summer
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