So we have an oldie here! We have a client who has this system, and we want to interface an ATA with it. Guessing it'll be a Viking unit, the same as every Bogen or Valcom possibly, etc. I have talked to Viking and Dukane (now CareHawk) individually and those techs tap out at about 10 minutes and "I can't find any documentation of this system) lol
See attached pic. I'm gonna do the Viking route, as we've done that before with the ATA's and it works. Just wondering if anyone here has experience with this exact make/model