DTMF Prompts not recognied if transferring outside line

[RyanRushBooth3285]

We have discovered that we are having issues with transferring calls and then hitting additional keys.

Here's a scenario,

I dial (***)***-5239 (Chads personal extension) from my cellphone
He transfers me to 5320( Medical Records AA)
I hit option 1 for copy of records AA and the prompt does not work.
I also tried this from an outside landline and got the same result. DTMF Function is not recognized.

If I call 5239 from my desk phone(5545) 4 digit dial
Her Transfers me to 5320
I hit option 1 and the prompt works fine.

I am very new to the Cisco CUCM world and don't know a lot about the networking side of this world just yet.

Any help would be much appreciated.

[PierMatteo]

Sounds like an issue with the border gateway you are using to route calls from PSTN to CUCM.

If the gateway is connected via SIP check that you have dtmf-relay configured on the dial-peers towards ITSP and CUCM.

Unity Connection would support rfc2833 and sip-kpml. Also, your provider might not support every dtmf mechanism.