Specifications

Copyright © AMETEK
21
21. G.703 Interface (64G) Module
21.1 Description
The 64G high speed data module communicates
with a data terminal running at 64 kbps (co-direc-
tional clock). Table 21-2 shows the module’s
specifications. The 64G Module provides one data
channel operating over one DS0.
21.2 Application
Communication between this channel module and
any data terminal must be synchronous, and the
data terminal must sync to the clock generated by
the 64G module (i.e. co-directional clocking).
The associated interface module is conveniently
designed with a standard DB25 female connector
for easy connection to other devices/equipment.
The 64R/G interface module provides connection
for G.703 interfacing.
21.2.1 Connection to SEL 311L
The pin-outs for connection to an SEL 311L relay
are shown in Figure 21-5.
21.3 Installation
As with other FOCUS modules, we recommend
that you initially install and test the 64G module
and interface in a “test” chassis (i.e., one that is
not part of an operating network). This way, you
can quickly perform the acceptance test without
interfering with a live network. Whether you are
installing the module in a test chassis or a chassis
that is on line in a network, use the installation
procedure described here.
The 64G module occupies one chassis slot and
one time slot. Before installing the module and its
interface, make sure that:
• The FOCUS chassis is set up, energized,
and operational, with all necessary
common equipment
• The FOCUS Configuration Software (FCS)
has been installed on your terminal
• Acceptance tests for the FOCUS chassis
and all previously installed equipment have
been done to rule out invalid test results for
this module
• FCS is up and running
21.3.1 Hardware Installation and
Connections
To install the 64G module and a 64R/G interface
module, complete the following steps.
1. Bring the FOCUS chassis “on line”.
Click on the “Online” speed button
.
This uploads to the FCS the current status,
settings, operating statistics, etc., for the
FOCUS chassis — and the 64G module.
2. Unlock the FOCUS chassis.
If the chassis is locked, execute the “Unlock
Configuration” command on the FCS Setup
menu or click on the “Unlock FOCUS
Chassis” speed button .
This puts the chassis into a configurable state,
allowing you to properly install the 64G
module and interface.
3. Insert the G.703 Interface (64G) Module
into the FOCUS chassis.
Carefully insert the 64G module into the top
and bottom grooves of any open slot on the
FOCUS chassis. 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.
When you first insert the 64G 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.