TELOS TWOX12 USER’S MANUAL
INSTALLATION
CHAPTER 2 41
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.
The signal to the Desktop Director™ is electrically similar to the ISDN S interface.
This connection is limited to 2300 Feet (700 meters) and wiring should be configured
using the extended passive bus configuration (see below for some examples).
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HOT TIP!
Since category 5 wire is so common (and prices have dropped) we recommend that you use it
instead of category 3 wire for the ISDN, Ethernet, and Desktop Director™ wiring.
Wiring Configurations for the Desktop Director™
Each Desktop Director™ is supplied with a 25-foot cable which is used to make this
connection. You can make your own cables as long as they follow the wiring shown above.
Category 3 type (Cat 3) or higher cable must be used; we suggest Category 5 type (Cat 5)
wire. The usual configuration of two Desktop Directors involves merely plugging in this
supplied cable to the Director and TWOx12 as illustrated below:
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