"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by briantroutman, February 13, 2018, 02:42:35 PM
Quote from: AE_Collector on February 17, 2018, 12:33:57 AMAny 1A1 or 1A2 System isn’t “really” what you want. ...An add on that a complete key system frequently had was an intercom on a line key to call to other stations.
Quote from: rdelius on February 19, 2018, 12:34:26 PMA dial selective intercomdoes not have a dial tone or ringback
Quote from: compubit on February 19, 2018, 08:35:39 PMThe 1A-series intercoms where you can "dial" a phone, basically have a separate box, which listens for either the tones or counts the pulses, then triggers one line, which you feed with either 90VAC to the bell or 10/18 VAC to a buzzer...
Quote from: AE_Collector on February 19, 2018, 11:14:03 PMIn other words, the talk patch is there for all phones...no switching. When you dial an extension this buzzes or rings that Extension alertingbthem to pick up...sortbof like the old party lines.