VS1 Installation, Configuration & Operating Guide 25
PEU Wiring Requirements
Each port on the PEU supplies remote power to display phones, and requires the use of 3-pair
wiring to connect the station to the PEU. For all other extensions, the PEU requires 2-pair wiring.
All ports are universal, enabling you to use any station option.
USOC is the wiring standard that should be followed for installing the VS1 phone system. Wiring
should adhere to the color code for USOC 6 conductor telecommunication lines as shown in the
diagram below.
USOC wiring
Cable Jack
White w/ blue stripe Green
Blue w/ white stripe Red
White w/ orange stripe Black
Orange w/ white stripe Yellow
White w/ green stripe White
Green w/ white stripe Blue
Pair Signal
Pair 1 Analog/Voice
Pair 2 Digital
Pair 3 Remote Power
Terminal Blocks
The Prewired 66 Blocks with Modular Telephone Jacks should be used for interconnection between
the RJ11 jacks of the PEUs and the station field wiring and Telco Demarc lines. Each CO or station
line from the terminal block is connected to the corresponding CO or station port on the PEU with
an RJ11 patchcord. Two versions of termination blocks are available:
• TM-8X3 contains 8 RJ11 telephone jacks for connection of 8 stations or CO lines. Only one
side of the termination block is used. The other side is unconnected and can be used for cross
connects.
• TM-16X3 contains 16 RJ11 telephone jacks for connection of 16 stations or CO lines. Both
sides of the termination block are used. This conveniently corresponds with a 16-port PEU.
Terminal Block
Wiring
Tip & Ring
designations
Jack pin numbe
designations
Pair 3
Pair 2
Pair 1
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