I think you have an RJ48 jack, not RJ45. For T1/HDSL it will be wired as an RJ48C (vs. RJ48S for DDS).
Pin 1 Ring1 (XMT to CPE) or/wh Pin 2 Tip1 (XMT to CPE) wh/or Pin 4 Ring (RCV from CPE) blu/wh Pin 5 Tip (RCV from CPE) wh/blu
I know this conforms to some spec (since its the same for all the T1 jacks I've worked with), but I can't say for sure if its per TIA-568B. I got the jack pin-out from the CPE wiring diagram for a Westell DSAWM-204 type-200 T1/HDSL mounting (I'm quite familiar with their products...), and the wire color from a cheat sheet we had lying about (don't know if your connections will be the same).
#160265 - 09/07/0510:06 PMRe: T1 Smart Jack & RJ45
Joe thanks for the response. I am certain it is RJ45, it is an 8-pin connector. I figured it out myself the next morning with a T-Bird. I was just hoping I could get a quick answer to save me some fumbling around. Thanks for your time.
FWIW, I guessed right on the pairs.
#160266 - 09/08/0506:11 PMRe: T1 Smart Jack & RJ45
electech, after doing some more research I found RJ45 and RJ48 are the same plug, just wired slightly different.
RJ (Registered Jack) designations are a specification for a particular jack/plug, wired to a specific USOC wiring pattern as originally defined in fcc part 68.502, and now defined by some independant industry board that I can't remember the name of, nor can I find the newer designations.
A jack/plug does not gain an RJ designation until it is wired, although there are specific jacks designed for specific applications that could be specified by a RJ designation.. examples might be RJ-31x and RJ-38x jacks which have shorting bars for alarm supervision.
The 8 position modular jack/plug is used for a number of different USOC applications, with differing RJ designations. Ethernet, token ring, etc do not have RJ designations at all.
RJ-61, RJ-41, RJ-45, RJ-48, RJ-31, RJ-38, ethernet, and token ring all use a 8 position modular jack/plug, with different wiring patterns.
#160268 - 09/10/0512:10 PMRe: T1 Smart Jack & RJ45
RJ48 has a keyed connector and a notched jack. RJ45 does not have a key or a notch. Both have 8 pins Although an RJ45 connector will fit an RJ48 jack, the key on an RJ48 connector will prevent it from plugging into an RJ45 jack.