User Manual

November 1999
M68333 Rev. A Tel-Link PMP - Sector Terminal Installation & Maintenance Manual 9-1
9.0 Sector Terminal IDU Board Installation
9.1 Introduction
The Basic IDU chassis consists of a power supply module(s), Modulators, Demodulators (FDMA network),
Burst Demodulators (TDMA network), Sector ATM Controllers and ODU MUXs. The Expansion IDU chas-
sis consists of Demodulators (FDMA), Demodulators (TDMA), Sector Expansion Controllers, and Receive
IF Demultiplexers. The Sector IDU is designed to avoid single points of failure and ease of replacement of
failed components. These cards are hot pluggable/swappable and can be configured for redundant opera-
tions as shown in Table 9-1 and Table 9-2. The Expansion chassis provides expansion of additional FDMA
and TDMA Demodulator boards for larger sectors (Refer to Figure 3-1).
.
WARNING! Precautions for anti-static protection should be taken whenever handling printed circuit
boards. Circuit modules can be damaged by electrostatic discharge. Ensure that an
approved anti-static wrist strap is connected between the wrist of the person and an
electrical ground before handling any of the circuit modules.
Placement of the common equipment boards within the IDU chassis is critical, and should follow the layout
as shown in Figure 9-1 and Figure 9-2. Insert the boards from left to right for each board type
Table 9-1 - Basic IDU Chassis Redundancy
Name Ratio Description
Modulator 1:5 5 online Modulators, 1 Redundant
Demodulator 1:10 10 online Demodulators, 1 Redundant
Controller 1:1 1 online Controller, 1 Redundant
ODU Multiplexer 1:1 1 online ODU MUX, 1 Redundant
IDU Power Supply 1:1 1 online Power Supply, 1 Redundant
Table 9-2 - Expansion IDU Chassis Redundancy
Name Ratio Description
Demodulator 1:15 15 online Demodulators, 1 Redundant
Controller 1:1 1 online Controller, 1 Redundant
RX IF Demultiplexer 1:1 1 online ODU MUX, 1 Redundant
IDU Power Supply 1:1 1 online Power Supply, 1 Redundant