Specifications

December 2008 Page 7–3
Chapter 7. Maintenance Module
7
requirements for the Maintenance Module. These
are covered in Chapter 23.
Once you are properly connected to the front or
rear DB-9 connector, the functionality is the same.
7.2 Application
The FOCUS Maintenance Module version 3 is
used with T1 looped or linear systems that may
optionally include alternate path mode (APM)
software, remote node configuration (RNC), or
party line order wire (PLOW) options.
7.3 Installation
A FOCUS chassis is typically shipped with the
Maintenance 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 Maintenance Module to your system,
we also recommend you first install and test it in a
test chassis.
If your Maintenance Module came already
installed in the chassis, you can skip the
Hardware Installation and Connections instruc-
tions that follow. If your Maintenance Module
came separately, complete both steps.
The FOCUS chassis provides two slots for the
Maintenance Module to accommodate both the
main board and the auxiliary board. This double
slot is labeled MAINTENANCE. It is the first slot
on the right as you look at the front of the chassis.
7.3.1 Hardware Installation and
Connections
To install the FOCUS Maintenance Module,
complete the following steps:
1. Insert the Maintenance Module into the
chassis.
In an operational chassis containing pretested
common equipment (except for the
Maintenance Module), carefully insert the
Maintenance Module into the top and bottom
grooves of the designated slot. Slide it all the
way in until it is well seated in the slot. Lock it
into place using the black inject/eject lever on
the front of the module.
2. Energize the chassis.
Energize the FOCUS chassis by applying
power.
When you first energize the chassis, and thus
the Maintenance 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.
7.3.2 Software Settings
No software settings are required to install a
FOCUS Maintenance Module.
To enable the party line order wire (PLOW) and
set up the system for operation, however, you
must do the following, using the FOCUS
Configuration Software (FCS):
• Enable the PLOW
• Set the real time clock
• Configure the chassis’ operational modes
STATUS LED
INJECT/EJECT
LEVER
COMPONENT SIDE
SOLDER SIDE
TX DATA
RX DATA
RS-232 PORT
MASTER
EAST
Figure 7–3. Maintenance Module (MV3) Main
Board Status Indicators