I am using numbers in the following format to join conference calls:

08081122334,,,,,123456789#

I have two issues:

- The conference number digits after the commas are sent at very low speed (about 1 per second)
- Often some of the digits are sent (or received?) twice. The automated voice says that the conference number is incorrect and confirms  the conference number. Same of the digits are repeated, following my example at times I hear back something similar to 11223456789.

If I manually dial the conference digits (either via the screen keypad or the keyboard), I do not have this problem.

Is there anything I am doing wrong?

Many thanks
Alex

Is it possible that the digit tones are held for longer when they are part of the number and that they are sometimes interpreted as two digits rather than one?

Also, would it be possible to reduce the 1 second delay between digits?

Ok. What about the duplicated digits? What can I do help replicating the issue?

Many thanks