Specifications

Section 520-10S-WI3-203
030-101591 Rev. B
R
17
0806I3RB
6.2 PCB Option Switches (Side Panel)
The 520-10SWI3 contains six option switches on the PCB to op-
tion the unit for proper operation. The locations of these
options are shown in Figure 16.
6.2.1 S1 & S2 − Operational Mode
S1 and S2 are slide switches that control the operational mode
of the repeater. Settings are shown in Table 5.
S2 S1
ON ON THRU (NIU/RPTR)
ON OFF LOCAL (NIU/RPTR)
OFF ON SPAN (NIU/RPTR)
OFF OFF OFFICE REPEATER
Table 5. Operational Mode
6.2.2 S3 − CPE RCV LBO
S3 is a slide switch that controls the CPE Receive LBO. The set-
tings are either 0 or −7.5dB.
6.2.3 S4A & S4B − Customer LOS Option
S4A and S4B are slide switches that control the Customer LOS
settings. Settings are shown in Table 6.
S4A S4B
OFF OFF LOOPBACK
ON OFF CDI
ON ON AIS
OFF ON (NOT USED)
Table 6. Customer LOS Option
6.2.4 S5 − Manual Loopback Button
See Paragraph 6.1.3.
6.2.5 S6 − NET XMT LBO
S6 is a slide switch that controls the NET Transmit LBO. The set-
tings are either 0 or -7.5dB.
7. INSTALLATION
Installation consists of inspecting the equipment for damage,
following proper safety precautions, mounting the
520-10SWI3 module in the proper slot of the mounting assem-
bly and verifying the presence of power and signalling as
indicated by the status LEDs (see Figure 9 through Figure 11).
- INSPECTION NOTE -
Visually inspect the unit for damages prior to installation. If the
equipment has been damaged in transit, immediately report the ex-
tent of the damage to the transportation company and to Westell (see
Part 6 for telephone number).
CAUTION - STATIC-SENSITIVE
This product contains static-sensitive components! Proper
electrostatic discharge procedures must be followed to
maintain personal and equipment safety. Do not store units
near magnetic, electromagnetic or electrostatic fields. Always
store or ship units in the original static-protective packaging
from Westell. Use anti-static mats when working on units.
- PRECAUTIONARY STATEMENT -
Never install telephone wiring during a lightning storm.
Never install telephone jacks in wet locations unless the jack
is specifically designed for wet locations.
Never touch uninsulated telephone wires or terminals unless
the telephone line has been disconnected at the network
interface.
Use caution when installing or modifying telephone lines.
7.1 Mounting the Module
The 520-10SWI3 is a 200 MECHANICSr module that mounts
in a 200- or 400-mechanics-type mounting assembly (or equiva-
lent mounting which matches the pin-out plan of the module).
Before installing the module, set any option switch(es) to the de-
sired position(s). Align the module with the mounting or
assembly card guides above and below the unit and insert as far
as it will go into the slot connector.
- CAUTION -
Use care when installing and removing modules - do not force
a module into place. If a module resists insertion, remove it
and check for obstructions in or near the module’s or shelf’s
connectors and mounting slots. The module may then be
carefully aligned and gently re-inserted.
Pin # Lead Designation Description
7
13
T
R
NET IN (Tip)
NET IN (Ring)
41
47
T1
R1
NET OUT (Tip 1)
NET OUT (Ring 1)
5
15
T1
R1
CPE OUT (Tip 1)
CPE OUT (Ring 1)
55
49
T
R
CPE IN (Tip)
CPE IN (Ring)
35 PWR Power IN (−PWR)
17 GND Ground (+PWR)
27 CH GND Chassis Ground
25 ALM Alarm Out
Table 7. Pin/Lead Designations
7.2 Making Installer Connections
The unit makes electrical connection when installed and proper-
ly seated in the 56-pin card-edge connector of the mounting. Pin
connections are shown in Table 7. No installer connections are
required for the 520-10SWI3 other than inserting the module
into the card-edge connector in the shelf or assembly.
7.2.1 Powering Considerations
The 520-10SWI3 can be powered from the 60mA span current
or from a local, external power source. When the unit is pow-