Phone Call Recorder

rj14

RJ11 is a physical interface often used for terminating telephone wires. It has six positions with two pins (electrical connections) installed at positions 3 and 4. RJ14 indicates that there is a second pair for an additional line on pins 2 and 5. RJ12 or RJ25 indicate that there is a third pair on pins 1 and 6. The six-position connectors are commonly (but unofficially) designated as 6P2C, 6P4C, and 6P6C (where 'P' stands for 'positions' and 'C' stands for 'conductors'), respectively. RJ stands for registered jack, which is part of the Universal Service Ordering Code and the United States Code of Federal Regulations, though this connector is now coming into worldwide use. The U.S. is now almost completely converted, except for some much-older homes. Like most other RJ connectors, this type of plug has a hinged locking tab that must be depressed to remove the plug from the wall jack. The disadvantage lies in the lightweight construction of the plug. If the plug were unhooked from the jack, and cord pulled free, the locking tab is subject to catching on the cord, desk, carpet, etc. and breaking it off. Some higher-quality cables incorporate a "snagless" plastic sleeve over the tab (or a redesigned tab) to prevent this, though this is almost exclusive to 8P8C data cables. Most residences are wired with the full four-wire cable, but many only have the inner pair actually connected to anything, LocalTalk was designed to use only the outer pair (the black and yellow wires). Many homes also used the second pair for power, with a transformer wired into an outlet near one jack providing 24 or so volts DC to all phones in the house. Technically these would be RJ11, because there is still only one telephone line connected, although RJ14 cords are required to access whatever is on the second pair. These connectors are sometimes also wired for RS-232 serial communication used on certain devices.

List of telephony terms:

3gpp - a-law - abbreviated dialing - adsl - ani - answering machine - apn - automatic ring back - b-channel - baud - bell 202 modem - bit rate - bonding - bri - busy signal - cable modem - call-progress tones - call accounting - call capture - call forwarding - call originator - call park - call pick-up - call transfer - call waiting - call waiting deluxe - called party - caller id - caller id spoofing - calling party - carrier wave - cbr - ccitt - cdma - cdma2000 - cellular repeater - celp - channel - clec - clock rate - codec - collect call - conference - conference call - crc - csd - d-channel - data compression - device driver - dial-up - dial - dial tone - direct-inward-dialing - direct distance dialing - distinctive ring - dnis - dsl - dsp - dtmf - dtr - duplex - echo cancellation - edge - extension - fax - fcc - fdma - fidonet - follow-me - g.711 - g.723.1 - g.723 - g.726 - g.lite - gprs - gps - gsm - h.323 - harmonic - headphones - hscsd - hspda - iad - idsn - internet call waiting - isp - ivr - jack plug - local loop - long distance - microcontroller - mobile phone - modem - modulation - mu-law - music-on-hold - night service - off-hook - on-hook - pabx - pager - payphone - pbx - pcm - pots - prank call - precise tone plan - pstn - pulse dialling - push to talk - ring modulation - ring tone - ringback - ringing signal - rj11 - roaming - serial communications - serial port - signal noise - sim - simplex - sit - sms - softmodem - switchboard operator - tapi - tdma - telecommunications - telemarketing - telephone - telephone call - telephone card - telephone company - telephone exchange - telephone line - telephone number - telephone numbering plan - telephone operator - telephone switchboard - telephony - tts - twisted pair - umts - v.32 - v.32bis - v.34 - v.42bis - vbr - vertical service code - voicemail - voip - vox - wap - wav - wi-fi - wimax - wire