Configurei o Asterisk com modem MD3200, qdo aciono o zaptel com o comando service zaptel start, testo com zttool e ztcfg -vv, inicia normalmente, em seguida inicio o asterisk com asterisk -vvv, ai começa as seguintes mensagens, como se estivesse alguém ligando.
Asterisk Ready. Apr 13 21:16:37 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)... Apr 13 21:16:37 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered)... Apr 13 21:16:37 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)... Apr 13 21:16:38 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered)... Apr 13 21:16:38 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)... Apr 13 21:16:38 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered)... Apr 13 21:16:39 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 18 (Ring Begin)... Apr 13 21:16:41 NOTICE[2454]: chan_zap.c:6062 ss_thread: Got event 2 (Ring/Answered).. Teve vez que nao acontece, ai ligo para o numero o qual conectei ao modem e escuto o som que programei no extensions.conf e em seguinda desliga. O que pode estar acontecendo? Valeu.

