TELOS TWOX12 USER’S MANUAL
CABLE GUIDE
APPENDIX 2 171
h
Hot Tip!
While TIA- 568A and TIA- 568B are electrically equivalent, care must be taken that
both ends of a given cable utilize the same system. For that reason we strongly
recommend choosing one of the two standards and using It throughout your
facility.
Desktop Director™ to TWOx12 Cable Pinout
The Desktop Director interface is electrically very similar to the ISDN S interface
“extended” configuration. Wiring practices and termination resistor rules for the S
interface apply. In this configuration we are using the optional PS2 power convention
so the pair on pins 7 & 8 is needed. This cable uses 8-position 8-pin miniature
modular (RJ-45 style) plugs. The wiring uses 3 of the 4 pairs described in TIA-
568A/B.
PIN COLOUR DESCRIPTION
1 White/Green Not used
2 Green Not used
3 White/Orange Xmt (TE to NT1) to Network +
4 Blue Rcv (NT1 to TE) from Network +
5 White/Blue Rcv (NT1 to TE) from Network -
6 Orange Xmt (TE to NT1) to Network -
7 White/Brown PS 2 Power - 48 VDC
8 Brown PS 2 Power ground (+)
Desktop Director™ cable wiring diagram. TIA 568A or 568B standard
Category 5 cables may be used. Both ends are wired identically.
Standard 10Base-T Ethernet Cable Pinout
Traditionally Ethernet 10Base-T cables use the Green and Orange pair of the TIA-
568A or TIA-568B wiring configuration. The full 4-pair TIA-568A or TIA-568B
configuration will work just fine.
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