I use IVM through a modem directly connected to a PSTN line. I am trying the software to transfer the call to a cell phone or another landline after answering it.
I thought the modem had a problem with flash-hook, but I tried it through hyperterminal of windows XP and the line accepts the signal sent by the modem. Moreover, I used the outbound calls feature of IVM in order to test the flash-hook by dialing for example !,55555555 and again the line accepts the flash and digits and the call is fulfilled.
So it seems that the problem appears only using the call transfer feature, and the line either does not recognize the flash, or the digits. The call is never transferred.
I tried a lot of things but with no result (a command might help?). Any suggestion will be appreciated.