tip and ring

listen to the pronunciation of tip and ring
الإنجليزية - الإنجليزية
The tip wire (T) connects to the tip conductor of a switchboard plug, providing the Ground portion of the circuit The ring wire (R) connects to the positive side of a battery at the telephone company's Central Office, providing the Positive portion of the circuit
­ The name for the two wires on a telephone line, derived from the electrical contacts on old-style telephone plugs (one electrical contact is at the tip of the plug, and the other is a ring just above it) A usually low amount of voltage is carried on one of these wires, enough to make an old-style mechanical phone's bell ring Reversal of these wires in certain situations can cause excess noise on your extensions after your DSL becomes active
A pair of wires that provide the electrical connection between a telephone set and the local CO The more electrically positive side of a POTS telephone line (0 V) is the tip Its counterpart is the ring, which is the more negative side, 52 v)
tip and ring
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