Specifications

December 2008 Page 4–11
Chapter 4. Acceptance Tests
4
3. Observe the LEDs.
All the red LEDs on both the main and
auxiliary boards should be off. On each
chassis, the green LED for either RCVR-A or
RCVR-C should be on. With dual trans-
ceivers, either the RCVR-B or RCVR-D LED
should be on as well. The LED that is on
represents the receiver that is being processed.
Figure 4–5. Hot Standby Fiber Test Connections
4. Disconnect the coupler for receiver A or C,
whichever is active.
Disconnect the coupler on the fiber optic
cable going to RCVR-A or RCVR-C,
whichever is being processed (i.e., the one
with the lit LED).
5. Observe the LEDs.
The red LED for the receiver you discon-
nected (i.e., LSIGA or LSIGC) should come
on. At the same time, the green LED on the
other receiver (i.e., RCVR-C or RCVR-A)
should come on. For example, if you discon-
nected receiver A, the red LSIGA LED should
come on to show the loss of signal there, and
the green RCVR-C LED should come on to
show that the signal is now being processed
by receiver C.
Repeat Steps 4–5 for each direction.
The following four-fiber hot standby tests
require four FOCUS chassis connected to
each other with fiber optic cables.
NOTE
T 1-1 (A)
R 1-1 (A)
T 1-2 (B)
R 1-2 (B)
T 1-1 (C)
R 1-1 (C)
T 1-2 (D)
R 1-2 (D)
R 1-1 (A)
T 1-1 (A)
R 1-2 (B)
T 1-2 (B)
R 1-1 (C)
T 1-1 (C)
R 1-2 (D)
T 1-2 (D)
= Fiber Optic Coupler
Chassis BChassis A