Does MT support VoIP telephony over ISDN BRI interfaces?
Yes, you can add a winbond (very cheap) ISDN card to your system.
Be sure to add the telephony and isdn packages. You also have to add the ISDN card driver.
But, only H323 is supported, not SIP.
Which makes it fun to experiment with, but not really very useful.
There will be only h323 ip phones and softphones connected to MT, so h323 is ok.
Thank you for explaining.