Backport WaitForSilence from 1.4 to 1.2

Hello,

Asterisk 1.4 has a 3rd option in application WaitForSilence. This 3rd option seems crucial to AMD working properly on business IVRs.

However, I trust 1.2 currently, and would like to use 1.2 for our dialer.
I’d like to know how I could backport the WaitForSilence from 1.4 to 1.2… or if someone has already done it, and wouldn’t mind helping out.

Thank you.

No one?