Specifications

Page 4–12
FOCUS System Manual
Figure 4–6.
Four-fiber Hot Standby Test Connections
To test the Optical Transceiver Module’s four-
fiber hot standby functionality, complete the
following steps:
This test applies only to the version of the Optical
Transceiver Module with the four-fiber hot
standby option. For ease of reference, we will
refer to the four chassis according to their labels in
Figure 4-6 (i.e., Local, Remote 1, etc.).
1. Set up and energize the four chassis.
Set up and energize the four test chassis per
Steps 1–3 in the “Acceptance Test” section
earlier in this chapter.
2. Connect the four chassis with fiber optic
cables.
Connect the four test chassis using fiber optic
cables per the diagram in Figure 4-6.
3. Observe the LEDs.
All the green LEDs on both the main and
auxiliary boards of all four chassis should be
on (i.e., the STATUS, HSBOK-C, and
HSBOK-D LEDs).
4. Disable transceiver 1-1 A on the “Local”
chassis.
Disconnect the fiber optic cable going to the
receiver of transceiver 1-1 A on the “Local”
chassis.
5. Observe the LEDs on all four chassis.
Table 4-2 shows the LEDs that should be lit
on all four chassis after you complete Step 4.
Amore visual depiction of the LEDs on each
chassis is shown below (the darkened LEDs
are lit, or ON).
Hot Standby
Fiber Path
Main Fiber
Path
Local
1-2
1-1
A
B
C
D
Remote
1
A
1-1
1-2
B
C
D
Remote
2
A
1-1
1-2
B
C
D
Remote
3
A
1-1
1-2
B
C
D
CHASSIS
LED
LB-A LB-B LSIG-A LSIG-B SWTCH-C HSBOK-C LSIGC LSIGD SWTCH-D HSBOK-D
Local ON ON ON ON
Remote 1 ON ON ON ON
Remote 2 ON ON ON ON
Remote 3 ON ON ON
Table 4–2. LEDs on all Four Chassis with Transceiver 1-1 A on the “Local” Chassis Disabled.