Specifications

December 2008 Page 11–3
Chapter 11. Optical Transceiver Module
11
than 50ms for most applications. The module
maintains high reliability by continuously moni-
toring the standby fibers to ensure their
availability in the event of a fiber link or node
failure.
11.3 Installation
A FOCUS chassis is typically shipped with the
Optical Transceiver Module already installed,
along with the other common equipment and the
specified channel modules. We recommend that
you set up the entire chassis in a test setting,
attach any necessary wiring or cables, and test its
functionality before installing it in an operating
network. Likewise, if you are adding a new or
replacement Optical Transceiver Module to your
system, we also recommend you first install and
test it in a test chassis.
If your Optical Transceiver Module came already
installed in the chassis, you can skip the
Hardware Installation and Connections instruc-
tions below. If your Optical Transceiver Module
came separately, complete all steps.
The FOCUS chassis provides two double-size
slots for transceiver modules. These are labeled
XCVR-1 and XCVR-2 on the front of the chassis.
11.3.1 Hardware Installation and
Connections
To install the FOCUS Optical Transceiver
Module, complete the following steps:
1. Insert the Optical Transceiver Module into
the chassis.
In an operational chassis containing pretested
common equipment (except for the Optical
Transceiver Module), carefully insert the
Optical Transceiver Module into the top and
bottom grooves of one of the two transceiver
slots. If you are installing just one transceiver
module in the chassis, we recommend putting
it in the slot labeled XCVR-1. Slide it all the
way in until it is well seated in the slot. Lock
it into place using the black ejector clip on the
front of the module.
2. Connect the inter-node (transceiver)
cables.
Pass the fiber optic cables through the two
holes at the rear of the chassis labeled “FIBER
OPTIC XCVR-1” (for the transceiver/s in the
XCVR-1 slot) and “FIBER OPTIC XCVR-2”
(for the transceiver/s in the XCVR-2 slot)
Connect the cables directly to the fiber optic
transceiver(s).
3. Energize the chassis.
Energize the FOCUS chassis by applying
power.
When you first energize the chassis, and thus
the Optical Transceiver Module, the red/green
status LED is red. If the module is functional,
the status LED turns green within 20 seconds.
If the module is non-functional, the status
LED stays red, even after 20 seconds have
elapsed.
11.3.2 Software Settings
No software settings are required to install a
FOCUS Optical Transceiver Module. If the
system supplied includes transceiver modules
with the ability to disable individual transceivers
and the FOCUS firmware also supports this (as
noted below) then the user may disable one or
both transceivers on the modules using the FCS
version 3.11 or greater.
If, when you install a dual transceiver, you
connect just one of the transceivers—saving
the second transceiver for future use—you
must jumper the unused transmitter to the
unused receiver using an external jumper.
With FFHS or standard hot standby systems
however, you must secure all fiber connec-
tions correctly, without the use of hardware
loopback to ensure proper operation.
NOTE