I have connected fax, through SCCP - ATA and VG202 but observing problem. I have external BRI lines. When incommuing call comes for the fax only at the begging fax signal is heard (about 1 second) then it stops. I have configured the voice gateway as h323 or sip but the same behaviour occurs. The vad is disabled and there is network clock select and participate for the BRI interfaces. The only codec used is G.711ulaw.
Any suggestions for the reason of this behaviour will be greatly appreciated.