DTMF not working between 2 CUCM SIP Trunks

Dears
We have configured 2 SIP trunks on 2 CUCM servers , all calls are working fine except the DTMF ?? any ideas what can enable the DTMF between the SIP Trunks??
Inter-Cluster Trunk (Non-Gatekeeper Controlled) On Both Sides and the Codec is G.711u
Best Regards

Ok, so as I understand following is the issue description.
There are 2 sites A & B. A has CUCM cluster for IPT users & Site B has CUCM Cluster for Contact Center users. These 2 clusters are connected using Non-GK controlled ICT.
Site A users when call Site B IVR, they hear the greeting but DTMF is not recognized hence they are unable to choose between options. Correct ?
1. What are the CUCM, IP IVR or UCCX/UCCE versions ?
2. Are the site B users able to choose options without any issues ?
3. When you said IVR, is it IPIVR/UCCX/CVP, Unity Connection, Unity, CUE or BACD on gateway ?
Please, always give full details of your setup & then ask the query, as it helps you only to get a quick & precise answers.
GP.
Pls rate helpful posts by clicking on stars below the post !!

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    I figured it out.  Long story short, it was a port mismatch.  When you configure Mobile Remote Access on the Expressway Core it creates a SIP trunk from Expressway to CUCM using port 5060.  If you then create another SIP trunk from the same Expressway to CUCM for firewall traversal or external calling, you must use a different port.  The port used for the zone in Expressway must match the SIP security profile used on the CUCM side SIP trunk.  So I had created another SIP Security profile in CUCM with port 5062 for this purpose.  However, the VCS in question that I was working with was only being used for FW traversal, so I used 5060 as the port on the VCS side, but I applied the SIP security profile that used 5062 on the CUCM side.  That's why CUCM was throwing that "device not found" error.  Once I changed the Security Profile to match the same port used on VCS (5060) all was well.  Sorry for the long winded answer.  Hope it helps someone else down the road.

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