I have 3CX with an Audiocodes MP-114 which has 2FXO and 2FXS. I have a phone line into the FXO and an analog phone plugged into the FXS and I can call another SIP endpoint no prob but only talk for about a minute before it hangs up on me. I didn't see anything in the logs that would show an error. Any ideas? I try to dial in from the analog phone OR from the phoneline and both exhibit the exact same behavior. It's like when the keepalive comes through it tears down the call for some reason?