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9951 dtmf issue on CUCM Version - 10.5.2.13901-2

We add new 9951 IP Phones in CUCM 10.5.2.13901-2.

In 9951 alone we have DTMF issues, in the same setup with 6921 ip phones we are able send DTMF digits.

active load on 9951 phone - sip9951.9-4-2sr2-2

6 REPLIES 6
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Cisco Employee

Which type of call flow is being impacted?

If you try calling into something internal like a call handler in Unity Connection or a script on UCCX internally does it work?

Manish

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ex, if I need login Unity connection, the PIN dtmf is not recognized, via  6921 able to enter pin number.

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Is it a SIP integration with Unity Connection or SCCP? If SIP, what is the dtmf method configured on the SIP trunk. Can you get the detailed callmanager SDI traces from cucm for a failed dtmf scenario? Please ensure there are proper MTP resources available in MRGL of the SIP trunk

https://supportforums.cisco.com/document/144711/understanding-dtmf-negotiation-and-troubleshooting-sip-trunks

Manish

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Unity Connection integration with SCCP.

In other IP Phone models  DTMF is working in the same setup, the issues is on 9951 IP Phones Model.

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Hi,

What is the firmware running on the phones? Also, check the bug below:

https://quickview.cloudapps.cisco.com/quickview/bug/CSCts24165

Aseem

(Please rate if useful)

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We are running the below CUCM and Firmware for 9951, could please let me know this version is affected by BUG.

CUCM Version - 10.5.2.13901-2

active load on phone - sip9951.9-4-2sr2-2.