RE
erroneously called an RJ-45)
RE

erroneously called an RJ-45)
I think on the voice you have to make sure they are 110 blocks and not 66. I have heard that it won't work on a 66 block.
That's the funnyest thing I have heard in a long time.
I agree with not using an 8 position/8 pin jack (erroneously called an RJ-45) for voice. Not only is there a problem with bent pins and the plug not fitting properly, if a computer is plugged into a voice jack by mistake the ring voltage will destroy the NIC. So do it right and use a 6 position/ 4 or 6 pin jack (RJ-11) for voice and all these problems are eliminated.
And yes, use 66 blocks and punch down all 4 pairs according to the color code.
-Hal
RJ stands for Registered Jack which were introduced by the Bell System in the 1970s under a 1976 FCC order ending the use of protective couplers. They replaced earlier, bulkier connectors. The Bell System issued specifications for the modular connectors and their wiring as Universal Service Ordering Codes (USOC), which were the only standard at the time.
The true RJ45(S) is an extremely uncommon registered jack, but the name "RJ45" is also used quite commonly to refer to any 8P8C modular connector.
Many of the basic names have suffixes that indicate subtypes:
* C: flush-mount or surface mount
* W: wall-mount
* S: single-line
* M: multi-line
* X: complex jack
Common types
* RJ11C/RJ11W: 6P2C, for one telephone line (6P4C with power on second pair)
* RJ14C/RJ14W: 6P4C, for two telephone lines (6P6C with power on third pair)
* RJ25C/RJ25W: 6P6C, for three telephone lines
[edit] Uncommon types
* RJ2MB: 50-pin miniature ribbon connector, 2-12 telephone lines with make-busy
* RJ12C/RJ12W: 6P6C, for one telephone line ahead of the key system
* RJ13C/RJ13W: 6P4C, for one telephone line behind the key system
* RJ15C: 3-pin weatherproof, for one telephone line
* RJ18C/RJ18W : 6P6C, for one telephone line with make-busy arrangement
* RJ21X: 50-pin miniature ribbon connector, for up to 25 lines
* RJ26X: 50-pin miniature ribbon connector, for multiple data lines, universal
* RJ27X: 50-pin miniature ribbon connector, for multiple data lines, programmed
* RJ31X: 8P8C (although usually only 4C are used), Often incorrectly stated as allowing alarm (fire and intrusion) equipment to seize a phone line, the jack is actually used to disconnect the equipment from the phone line while allowing the phone circuit to continue to the site phones.
* RJ38X: 8P8C, similar to RJ31X, with continuity circuit
(this is the one that should be used for fire and security applications because of the continuity pair. If the plug is removed from the jack a short is created between pins 1 and 8 therefore if correctly wired will trip a panic or fire alarm.)
* RJ41S: 8P8C keyed, for one data line, universal
* RJ45S: 8P2C + keyed, for one data line with programming resistor
* RJ48S: 8P8C, for four-wire data line (DDS)
* RJ48C: 8P8C, for four-wire data line (DSX-1)
* RJ48X: 8P8C with shorting bar, for four-wire data line (DS1)
* RJ49C: 8P8C, for ISDN BRI via NT1
* RJ61X: 8P8C, for four telephone lines
* RJ71C: 12 line series connection using 50 pin connector (with bridging adapter) ahead of customer equipment. Mostly used for call sequencer equipment.
The keystone jack which you are referring to is the design of the housing that the RJ-jack is contained in.