
60
MT64DSU Owner's Manual
BACK-TO-BACK CABLE
1
8
Figure C-5. Back-to-Back Cable
DESCRIPTION
This cable lets you test a suspect DSU by connecting it to a known
good DSU. It tests the suspect DSU by connecting its Transmit
signal to the good DSUs Receive circuits. You can order it from
Multi-Tech (#45050000), or build one using the instructions below.
Refer to Chapter 4 for test procedures.
SCHEMATIC
RJ48S
1
2
3
4
5
6
7
8
7"
RJ48S
8
7
6
5
4
3
2
1
BUILD INSTRUCTIONS
1.
Strip cable installation 3/4".
2.
Strip wires 1,2,7 and 8 on one end of cable and 8,7,2 and 1 on
other end 1/4".
3.
Cut unstripped wires off.
4.
Solder wire 1 on one connector to 8 on the other.
5.
Solder wire 2 on one connector to 7 on the other.
6.
Solder wire 7 on one connector to 2 on the other.
7.
Solder wire 8 on one connector to 1 on the other.
8.
Cover solder connections with 1" of shrink tube.
Summary of Contents for MT64DSU
Page 1: ......
Page 5: ...MultiDSU64K Chapter 1 Introduction and Description...
Page 13: ...MultiDSU64K Chapter 2 Installation and Cabling...
Page 21: ...MultiDSU64K Chapter 3 Testing...
Page 30: ...30 MT64DSU Owner s Manual...
Page 31: ...MultiDSU64K Chapter 4 Warranty Service and Tech Support...
Page 38: ...38 MT64DSU Owner s Manual...
Page 39: ...MultiDSU64K Appendixes...