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ADCP-50-304 • Issue 19 • June 1999 • Section 4: PatchSwitch X.21
Page 4-11
© 1999, ADC Telecommunications, Inc.
The three classes of interlock groups available are:
1. Global Interlock: Groups 1 and 2 are global and may be extended to all chassis in a
system, using a 20-pin interchassis interlock cable. With this grouping, all modules having
a jumper placed on group 1 make up one group, and all modules with a jumper on group 2
make up the other group. Interchassis interlock cables must be installed between chassis.
Each module interlock group jumper block may have no more than one jumper installed at
one time.
2. Horizontal Interlock: Groups 3 and 4 are horizontal and they include only modules in the
individual chassis. With this grouping, all modules having a jumper placed on group 3
make up one group, and all modules with a jumper on group 4 make up the other group.
These groupings do not extend out of the chassis and are not affected by the interchassis
interlock cable. Each module interlock group jumper block may have no more than one
jumper installed at a time.
3. Vertical Interlock: The vertical interlock jumper position is labeled V. Placing a jumper in
this position interlocks all modules in the same slot location in other chassis having a
jumper installed on the same V position. Interchassis interlock cables must be installed
between chassis. The interchassis interlock cable is a 20 position ribbon cable (4WC-03)
with a 20-pin connector for each chassis. Each module interlock group jumper block may
have no more than one jumper installed at a time.
6.2 Alarm Jumper Installation
Determine B alarm Enable or Disable before installing module. Modules are shipped with the
jumper strap placed in the ALMB position as shown in Figure 4-7. In this position the B Alarm
is enabled. To disable the B Alarm move the jumper to ALMB
.
Figure 4-7. Jumper Strap and B Alarm Time Delay Setting Location
1634-A
+
+
+
+
+
+
+
0
3
4
C
SW1
1234V
ALMB
ALMB
X.21 PATCHSWITCH
16 POSITION
A ALARM SWITCH
B ALARM
ENABLE/DISABLE
JUMPER
INTERLOCK
JUMPER