Turn off DTMF tone for entering Activity Code

[hungnnb]

Hi experts,
The call center requires agents to enter an activity code for every call they received. The problem is that while agents on the call, entering the code can generate DTMF tones that can be heard on customer side.
Can we have a way to turn off the tone during this process?

Thanks and best regards,

 

[Utreg]

Look in your PBX; is the EEST prompt set to YES?
If try to change EEST to NO in LD 15