i have an asterisk box set up with two pstn lines for inbound calls on two zap channels (i have a tdm400 card with two fxo modules). i have two voip lines for outgoing calls.
the issue that i’m having is kind of strange, but i’m getting a complaint from my boss who calls in constantly (he’s a micromanager…sigh). he says that if he calls in 3 times back to back, there is a kind of ‘fax machine’ sound that he can hear over the autogreeting. i would assume he means that there is a high pitched tone that sounds.
i don’t know if this tone goes away after a time, or after you make a selection, i haven’t been able to replicate it to test it. but he’s had the problem on more than one occassion and continues to point it out to me.
does anyone have any idea what might be causing this, or what i can do to track down the issue. i’m not even sure where to start looking really.