Asterisk Project
Configuration and Operation
Asterisk Channel Drivers
mISDN
Asterisk Project : mISDN Known Problems
Added by mdavenport , edited by mdavenport on Aug 31, 2010
Q: I cannot hear any tone after a successful CONNECT to the other end.
A: You forgot to load mISDNdsp, which is now needed by chan_misdn for switching and DTMF tone detection.