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RJ11

RJ11 is a physical interface often used for terminating telephone wires. It is probably the most familiar of the registered jacks, being used for single line POTS telephone jacks in most homes and offices. more...

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RJ14 is similar, but for a two line telephone jack, and RJ25 is for a three line jack. RJ61 is a similar registered jack for four lines.

RJ11, RJ14, and RJ25 all use six-position modular connectors.

An RJ11 jack uses two of the six positions, so could be wired with a 6P2C (six position, two conductor) variety of modular jack, but such jacks are quite rare. An RJ11 jack is nearly always a 6P4C jack, with four wires running to a central junction box, but unused. The extra connectors used to be used as an 'anti-tinkle' circuit to prevent a pulse-dialing phone from ringing the bell on other extensions. With tone dialing this isn't required so the connectors are used to provide flexibility so the jack can be rewired later as RJ14 or to supply additional power for special uses. Similarly, the cables used to plug telephone terminals into RJ11 jacks frequently are four-wire cables with 6P4C plugs.

In the powered variation, Pins 2 and 5 (black and yellow) carry 24-volt, DC power. While the phone line itself supplies enough power for most telephone terminals, old telephone terminals with incandescent lights in them (such as the classic Western Electric Trimline) need more power than the phone line can supply. Typically, the power on Pins 2 and 5 comes from a transformer plugged into a wall near one jack, supplying power to all of the jacks in the house.

Pinouts

Note that while the old solid color code was well established for pairs 1 and 2, there are several conflicting conventions for pair 3. The colors shown above were taken from a vendor of "silver satin" flat 8-conductor phone cable that claims to be standard. At least one other vendor of flat 8-conductor cable uses the sequence blue, orange, black, red, green, yellow, brown and white/slate.

Read more at Wikipedia.org


20 Rj11 Rj-11 Modular Plug Telephone Connector 10-040 $2.99 Lot Of (14)--Coax/Tp--Rj11 to Bnc Adapter--#B-1143 $19.99
Amphenol Cap for Sq. Flange Rcpt. Black Rj11Fc2B /Rohs $20.00 Amphenol Cap for Plug/Black Rj11Fc6B Rohs Compliant $24.00
Amphenol Square Flange Receptacle/Female Rj11F21B Ob 24 $32.00 Amphenol Plug Black w/Plastic Gland Rj11F6B Ob 24/Rohs $30.00
100pcs Rj11 Connector Modular Plug Telephone 6p2c cat3 $1.26 Rj11 Rj-11 Connectors Telephone Modular 100 Plugs Pack $3.20
Lot Of 10 Bnc Male To Rj12 Female Balun Adapters Rj11 $15.99 Noax Systems Coax Balun Bnc Male to Rj11 lot of 10 $14.95
Coax / Tp Baluns 038-050-12-00 (x10) Rj11 to Bnc $19.99 Coax / Tp Balun 038-058-12-02 (x10) Rj11 to Bnc $19.99
Coax / Tp Balun B-1143 (x10) Rj11 to Bnc $14.95 (x10) Harris Adacom Cm-1 Coax Balun Type 1 Rj11 to Bnc $24.95
(x10) Andrew Ctd-93C Coax Balun Rj11 to Bnc $24.95 50 New Icc Ic1076V0Wh Rj-11 Connector Voice Jack White $60.00
5 New Excelsus Z-Blocker Z-200Cw Wall Mount Dsl Filters $9.99 Rj11 Phone Modem Retractable Cable $4.99
100 x Rj11 Rj-11 Modular plugs Telephone Connectors P1 $1.49 100 pc Rj11 Modular Plug Telephone Connector 6P2C $3.99
3M Modem Cable Keeper Rj-11 Lx100 $1.25 Leviton Phone Jacks & Wall Plate $4.00
Adsl BroadBand Modem Rj11 Phone Line Splitter Filter $3.99 Rj11 4C Modular Connectors For Flat Cable 10 Pcs.Rj-11 $2.99
Suttle Se-630Ac4-85 White Wall Plate Jack New $4.99 Lot Krone 6467 5 195-10 Rj11 6X6 Outlet Keystone Ivory $7.50
Belkin Rj11 Telephone Retractable Cable $3.99 10 Rj11 4 Conductor Voice Couplers $5.25
10 Rj11 Telephone Splitters $5.85 Rj-22 Telephone Handset Mini Plugs (10 Pack) 4P4C $1.00
Rj-11 Rj11 6P4C Connector Modular Plugs Bag of 100 $5.99
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Prices current as of last update, 12/03/08 4:13pm.


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