Where Does The Patch Cord From The Register Connect To On The Biscuit Box

How to Wire a Telephone Jack (Voice or Telephone RJ-eleven thru RJ-14)

(USOC Wiring Diagram)

Telephone wiring for a phone outlet is typically either 1, ii or 3 pairs (2, 4, or 6 conductor). Most cable nowadays is UTP (unshielded twisted pair). There may be instances where you may need to connect to or transpose from the one-time "quad" cable. The diagram below provides the transposition between these standards.

Pair one (T1 & R1)

Usually the master dial tone or talk circuit is wired to the middle 2 pins (pins 3 & 4) and is the white/blue and blue/white pair (AKA: T1 & R1 - tip one and band i). A standard unmarried line phone draws dial tone from these heart pins.

NOTE: The type of wiring shown hither is known as USOC (pronounced U-sock). See background below.

Pair 2 (T2 & R2)

The secondary circuit is wired to the ii pins (pins 2 & 5) directly to the side of the center pins and is the white/orange and orangish/white pair (AKA: T2 & R2 - tip ii and ring 2). Depending on the application, the secondary circuit can either be the 2nd dial tone line on a two line phone, or the information/control circuit for an electronic fundamental phone.

Pair three (T3 & R3)

The third excursion is wired to the ii pins (pins 1 & 6) on the outside and is the white/green and green/white pair (AKA: T3 & R3 - tip 3 and ring 3). Depending on the application, the third circuit can either be the 3rd dial tone line on a 3 line phone or an accompaniment excursion for an electronic key phone.

Groundwork

Tip & Ring

In telephony the terms that represent the conductors that incorporate a circuit are known every bit "tip and ring". These terms stem from the early days of telephony when operators fabricated telephone connections using 1/4" phono plugs similar to those used today for stereo headphones. The old systems also carried a third wire which was a ground. The "Tip" was the tip of the plug and was the positive (+) side of the circuit. The "Ring" was a conductive ring right behind the tip of the plug and was the negative (-) side of the excursion. Right behind the ring was the "Sleeve" which was the basis connexion.

The ground (sleeve) is no longer used today for individual pairs.

USOC (Universal Service Ordering Codes)

In the onetime days of telephony, USOC (pronounced U-sock) standards were used to simplify and standardize the various different wiring schemes for modular jacks.

RJ (RJ-eleven, RJ-45 Etc.)

The USOC standards consisted of many different Registered Jack Configurations which were abbreviated as "RJ" and had designations like RJ-11, RJ-12, etc. Today we still refer to modular jacks in the RJ designations but rarely use them to refer to a wiring standard that they were originally intended for. Even though it is technically wrong, popular terminology today for the terms RJ-11, 12 or fourteen refer to a half dozen pivot jack and RJ-45 refers to an eight pin jack.

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