Telos Zephyr Xstream, User Manual

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USER’S MANUAL
Appendix 9 – Modular Cable Guide 339
Appendix 9: Modular Cable Guide
This appendix is intended to be a reference tool that covers various modular telephone ‐ style
connectors used with your Xstream.
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IMPORTANT!
Be very careful to label wiring using RJ- style connectors. In some cases, they have
power on them, and there is a risk of applying this power to something that does not
expect it. For this reason we suggest that you use different colored cables (or connector
boots) on the ISDN S interface cables versus your Desktop Director & Ethernet cables
Pin Numbering on RJ Style Jacks
It is recommended practice to install modular wall jacks such that the pins are at the top of the
cavity when viewed. This helps to protect the contacts from water when baseboards are
mopped, and from dust. When the jack is oriented in this position (i.e. looking into the jack with
the contact pins at the top) the pins are sequentially numbered left to right.
Note that some jacks may not have all pin positions populated, however the numbering would
still begin with the first position. For instance, the "RJ ‐ 11" style jack is a 6 ‐ position 4 ‐ pin jack.
Therefore, it has pins 2,3,4, & 5. Pins 1 & 6 may be absent. Note that all but a few of the
following cables use 8 ‐ position 8 ‐ pin miniature modular connectors (RJ ‐ 45 style) on both ends.
In today’s rapidly changing facilities, it is worth considering using a universal system for most of
these cables. This strategy allows the most flexibility since the same wiring configuration could
be reused for a different purpose without doing anything but documenting the change!
Therefore, we recommend that you use the TIA/EIA ‐ 568 ‐ A T568A cable specification. This
specifies a Category 5 (Cat. 5) cable with 4 pairs wired straight through (both ends wired
identically) as follows:
PIN COLOR
1 White/Green
2
Green
3 White/Orange
4
Blue
5 White/Blue
6
Orange
7 White/Brown
8
Brown
TIA/EIA ‐ 568 ‐ A T568A color codes. Cat 5 cable Is used and both
ends are Identical. The color conductor of each pair may or may
not have a white stripe. The other half of the pair may be either
white or white with a colored stripe. We will use this color
coding in our examples.