Specifications

December 2008 Page 16–5
Chapter 16. Low Speed Data (232) Module
16
16.5 Acceptance Test
As noted earlier, we recommend that you initially
install and test 232 modules in “test” chassis (i.e.,
chassis that are not part of an operating network).
This way, you can quickly perform the acceptance
tests without interfering with a live network.
We recommend that you use the HP 1645A Data
Error Analyzer to test the data flow through the
232 modules. If you are using a modem, also test
the modem communications.
To conduct these tests, you will need the
following:
•Two 232 modules and interfaces
•Two FOCUS chassis
•Two assigned time slots on the FOCUS
T1/E1 line for channels A and B
• An HP 1645A Data Error Analyzer with an
RS-232C cable with a DB9 male connector
•Up to 14 AWG wire for jumpers
• (Optional) Two modems
To test the data flow through the 232 modules,
complete the following steps:
1. Install the 232 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 232 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 232 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 — and the channel
modules — into a configurable state.
5. Connect your test equipment.
Power up the HP 1645A Data Error Analyzer.
Connect the RS-232C cable from the test set
to the DB9 female connector for channel A on
the 232 interface at the rear of the “local”
FOCUS chassis. On the “distant” chassis,
install two jumpers: one from pins 2 to 3 (RD
to TD); one from pins 7 to 8 (RTS to CTS).
Refer to Figure 16-2 for the pin locations. The
jumpers loop the signal back to the test set.
Figure 16–4. RS-232 Pin Assignments.
6. Set the settings on the test set.
Set the settings on the test set as follows:
a) Set the data rate (under the Clock setting)
to 300 bps.
b) Set the Pattern to 2047 (22047).
c) Put the Exponent Range on 9.
d) Make sure the OFF/XMIT ERRORS
switch is in the OFF position.
7. Send test signals and observe the results.
Flip the Start switch to run the test.
Observe the results. You should see zero (0)
errors on the test set display. If the test set
reports errors, check the connections, the
module, and the time slot assignments.
Repeat Steps 6–7 several times using different
settings for the data rate. For example, use
settings of 1200, 2400, 4800, and 9600 bps.