Specifications

December 2008 Page 17–11
Chapter 17. Pilot Wire Interface (HCB/SPD) Module
17
(for future use) – This green LED is reserved for
additional functions to be added later.
17.5 Acceptance Test
As noted earlier, we recommend that you initially
install and test Pilot Wire Interface 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.
To conduct these tests, you will need the
following:
•Two Pilot Wire Interface Modules and
interfaces
•Two FOCUS chassis
• One assigned DS0 time slot on the FOCUS
T1/E1 line
•Avoltage supply source having an output
range of 35 to 250Vdc with a control
switch to turn the voltage on and off (this
applies the key-in needed to trip the circuits
on the modules)
•An ohm meter (we recommend an analog
ohm meter for easier determination of
readings)
•Alow impedance (50Ω) oscillator
•Up to 14 AWG wire for connections
• One scope
•Two 330Ω & 1KΩ resistors
To test the functionality of the Pilot Wire
Interface Modules, for both two-terminal and
three-terminal applications, complete the
following steps:
(For complete instructions on specific FCS proce-
dures, please refer to the FCS online help facility.)
1. Install the Pilot Wire Interface Modules
and interfaces.
If the modules and interfaces have not been
installed, do so now following the instructions
in the “Installation” section earlier in this
chapter. For two-terminal applications,
designate one chassis as the local terminal and
the other as the remote terminal. For three-
terminal applications, designate one chassis as
the local terminal and the other two as the
remote terminals.
When you first install each Pilot Wire
Interface 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-func-
tional, the status LED stays red, even after 20
seconds have elapsed. This is the first accep-
tance test.
2. Connect the ohm meter and voltage supply
source.
Using Figure 17-14 and Figure 17-15 as a
guide, connect the voltage supply source to
the local and remote terminals.
3. Start the FCS.
Bring up the FOCUS Configuration Software
(FCS), if it is not already running, by clicking
on the FCS program icon .
Complete Steps 4–11 for each HCB module in
each chassis. For two-terminal applications,
configure the HCB module in the local
chassis and then the HCB module in the
remote chassis. For three-terminal applica-
tions, configure the left and then the right
HCB module in the local chassis and then
repeat for the left and right HCB modules in
each of the remote chassis.
When you have completed the configuration,
the settings on all the modules you are
testing will be as follows:
DTT Input Output: Enabled
DTT Output Trip Hold Time: 0ms (none)
LOPC Mode: OCT-Don’t short pilot wire
LOCC Mode: OCT/NX Do not xmit signal
DTTCC Mode: OCT/NX Don’t Xmit to rcvr
NOTE