DTMF not working through our hybrid devices.MX300 registered to our CUCM using our Spark-RD device.CUCM version 11.5.1(Su5)Expressway 8.11
-MX300 dials 02034785289 (Cisco webex) -> Expressway-E -> Expressway-C -> CUCM -> MGCP Router -> PSTN.--Call establishes--No DTMF
-MX300 dials 8888 (VM Pilot) -> Expressway-E -> Expressway-C -> CUCM -> SIP ExchangeUM Voicemail--Call establishes--DTMF works
-DeskPhone dials 02034785289 -> CUCM -> MGCP Router -> PSTN.--Call establishes--DTMF
-Jabber MRA dials 02034785289 (Cisco webex) -> Expressway-E -> Expressway-C -> CUCM -> MGCP Router -> PSTN. (separate EXP environment)--Call establishes--DTMF works
We have registered a software and hardware MTP and assigned to Device pool of Spark-RD and EXP-C Trunk.
Please advise on how we get DTMF to work from a Spark-RD Board. We have three Spark-RD boards registered with the same symptoms. Our Spark-RD Webex Teams clients all have the same symptoms.
TAC advising that the workaround would be to upgrade to 12.0. This is not an option for us.
Other reported instances:
https://www.reddit.com/r/networking/comments/9is10z/webex_teams_is_down/ - Search DTMF post
Go to Solution.
RESOLVED: setting this on the gateway and forcing CUCM to use "Out-of-Band" on the gateway page.
#mgcp package-capability dtmf-package
View solution in original post
DTMF is seen on the pcap between the Expressway-C to CUCM Sub as RFC 2833.
So must either be CUCM or MGCP not liking it. Can't see anything in the ccm/cti logs pulled from RTMT.
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