A telephony term describing a signaling method whereby one station detects that a circuit is grounded at the other end.
This is a type of analog voice grade access line signaling that requires the customer interface to provide a ground on the ring conductor at the network interface to initiate service requests.
A way of signaling on the subscribers trunks how the wires are grounded in order to get dialtone. This is very important to know when ordering your service from your local company. PBXs generally work best on ground start trunks. Single line phones and key systems tend to work best with "loop start" grounding.
Edit / Ground Start Signaling - Ground-start signaling for a two-way dial system is an old technology (introduced in the 1920s). It is used typically on two-way PBX central office trunks with direct outward dialing (DOD) and attendant-handled incoming call service. The ground-start line conductors transmit common battery-loop supervision, DTMF address signalling or loop dial pulses, alerting signals, and voiceband electrical energy. See Also: Loop Start Wink Start
A method of signaling between two machines where one machine grounds one side of the line and the other machine detects the presence of ground.
Method of signaling from a CO in which one side of a cable is temporarily grounded.
A method of circuit seizure between a central office and a PBX that transmits an immediate signal by momentarily grounding the tip of the line.
Method by which to signal the CO that a calling party has gone off-hook. Ground is momentarily connected to the "tip" side of the CO line ( refer to loop start)
A signaling method in which the customer premises equipment (CPE) transmits an off-hook condition by creating a zerovoltage condition.
A method to signal the CO that the calling party has gone off-hook. A telephone line can either ground start or loop start.
In telephony, a ground start is a method of signaling from a terminal or subscriber local loop to a telephone exchange, in which method a cable pair is temporarily grounded to request dial tone. Most middle 20th century American payphones used "coin first" ground start lines, with the starting ground passing through the coin itself.