Specifications

December 2008 Page 21–3
Chapter 21. G.703 Interface (64G) Module
21
cable) has dropped below –15dB. The
LOOPBACK red LED, when lit, indicates that the
module is in analog loopback (i.e., the loopback
switch is down). Data from the channel is looped
back to the channel when in analog loopback.
Figure 21–2. 64G Status Indicators.
21.5 Acceptance Test
As noted earlier, 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.
To test the data flow through the G.703 Interface
(64G) Module with the electrical interface, we
recommend using the Fireberd Model 6001 or
similar data tester.
To test the 64G module’s data flow, complete the
following steps:
1. Install the 64G module and interface.
If the module and interface have not been
installed, do so now following the instructions
in the “Installation” section earlier in this
chapter.
When you first install the 64G module in a
live, unlocked chassis, 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.
This is the first acceptance test.
2. Start the FCS.
Bring up the FOCUS Configuration Software
(FCS), if it is not already running, by clicking
on the FCS program icon .
3. 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.
4. 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.
5. Connect your test equipment to the 64R/G
interface module.
Carefully wire a DB25 male connector for
your test equipment, as follows:
If you are using a Fireberd Model 6001
equipped with the G.703 interface options,
connect the FOCUS interface and the Fireberd
using the pin connections shown in Table 21-
1. Always maintain the correct polarity.
6. Set the test equipment settings.
Follow the setup menu in the Fireberd to
make sure the test frequency and the interface
STATUS LED
INJECT/EJECT
LEVER
COMPONENT SIDE
LOOPBACK SWITCH
SOLDER
SIDE
LOOPBACK
TX DATA
RX DATA
RX ALARM
CHANNEL
LINE
CHANNEL
LINE
OUTPUT
INPUT