Terms You Should Know
AuxiliaryAlert —A door speaker’s push button can activate a bell/chime within the building.
Cadence —Telephone Ringing cycle, i.e., 2 second ringing, 4 second no ringing.
C.O. line —Central Office telephone line carrier into building.
EKTS (Electronic Key Telephone System) —Small business telephone communications system.
Ground Start —One method by which a business telephone system (PBX) signals the telephone company that you have gone off-hook. Used in most business applications – contact your telephone company to determine if you have Ground or Loop Start.
Loop Start —One method of signaling the telephone company that your telephone has gone off-hook – used for most residential and communication system applications. Contact your telephone company to determine if you have Ground or Loop Start.
PBX (Private Branch Exchange) —Business telephone
system.
Ringdown —In Station mode, the activation of the door speaker’s push button will cause the AT&T Door Phone Controller to dial the number of a predetermined telephone station number (PBX or EKTS must be installed). When the telephone is answered, there is direct two-way communication with the door speaker.
Trunk Port —PBX connection for Central Office or trunk lines.
Station Port —PBX connection for station sets.
Hook-Flash—This causes telephone equipment to go “on hook” for a duration usually less than a second (not long enough to be considered as calling for the circuit to be released.)
