Specifications

Page 3–6
FOCUS System Manual
If the chassis input/output interface is elec-
trical (i.e., if it has one or more DS1
Transceiver Modules), make the connection
as follows:
Connect the interface cable directly to the
DS1 interface, labeled “P2,” on the mother-
board. The pin assignments for the module’s
DB25 female connector are shown in Figure
3-2. Carefully wire a DB25 male connector
for your equipment. Note that the interface is
designed to accommodate two DS1
Transceiver Modules, with each having single
or dual transceivers. You need to connect
wires only for the number of transceivers
actually present.
For example, if you are connecting one DS1
Transceiver Module with dual transceivers to
two external DS1 ports, wire the pins for both
transceivers. If you are connecting to a single
external DS1 port, you need only wire the pins
for a single transceiver.
3. Install the common equipment.
The slots for the common equipment, or
system modules, are on the right-hand side of
the chassis, when viewed from the front. The
slot for each module is labeled accordingly.
To install each system module, carefully insert
it into the top and bottom grooves of its desig-
nated slot (e.g., insert the Maintenance
Module into the slot labeled “MAINTEN-
ANCE”). The grooves are marked with black
lines for ease in alignment. Slide the module
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.
Figure 3–2.
DS1 Transceiver Module Interface Connector.
4. Energize the chassis.
Energize the chassis by applying power from
the connected power source.
When you first energize the chassis, the
red/green status LED on the front of each
system module is red. If the modules are func-
tional, and the chassis is unlocked, their status
LEDs should turn green within 20 seconds. If
a module is non-functional, its status LED
stays red, even after 20 seconds have elapsed.
5. Install the channel modules.
The slots for the channel modules are on the
left-hand side of the chassis, when viewed
from the front. They are labeled “1” through
“12.” As with the system modules, some
channel modules require two slots, while
others require just one slot. Unlike the system
modules, the placement of the channel
4&17—Transmitter 1-1
3&16—Receiver 1-1
2&15—Transmitter 1-2
1&14—Receiver 1-2
10 & 22 — Transmitter 2-1
11 & 23 — Receiver 2-1
12 & 24 — Transmitter 2-2
13 & 25 — Receiver 2-2
(RX1-2) 1
(TX1-2) 2
(RX1-1) 3
(TX1-1) 4
(N/C) 5
(N/C) 6
(N/C) 7
(N/C) 8
(N/C) 9
(TX2-1) 10
(RX2-1) 11
(TX2-2) 12
14 (RX1-2)
XCVR 1-1 Pin Assignments
XCVR 1-2 Pin Assignments
XCVR 2-1 Pin Assignments
XCVR 2-2 Pin Assignments
15 (TX1-2)
16 (RX1-1)
17 (TX1-1)
18 (N/C)
19 (N/C)
20 (N/C)
21 (N/C)
22 (TX2-1)
23 (RX2-1)
24 (TX2-2)
25 (RX2-2)
(RX2-2) 13
If, when you install a dual transceiver, you
connect just one of the transceivers—saving
the second transceiver for future use—you
must jumper the unused transmitter to the
unused receiver using an external jumper.
NOTE
If, when you install a dual transceiver, you
connect just one of the transceivers—saving
the second transceiver for future use—you
must jumper the unused transmitter to the
unused receiver using an external jumper.
NOTE