9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. II-1-3
Terminal Indoor Units
IDUs are available in variants to transport PDH, SDH or Ethernet on ETSI and
ANSI bands. See Table 1-2.
Table 1-2. IDU Variants
ODU options support operation on bands 5 to 38 GHz:
• 5 to 23 GHz with ODU 300ep
• 7 to 38 GHz with ODU 300hp
IDU Overview
IDU 20x
IDU 20x supports 20 tributaries on individual RJ-45 connectors for E1 or DS1
operation, modulation options to 128 QAM, and over-air capacities to 40xE1 or
32xDS1. Features include:
• Capacities to 20xE1 / 16xDS1 for single link non-protected operation.
• Capacities to 20xE1 or 16xDS1 for hot-standby or space diversity operation.
• Capacities to 40xE1 or 32xDS1 for hot-standby operation
• IDUs are paired for protected/diversity operation.
• For capacities to 20xE1 / 16xDS1 normal IDU equipment and path
protection applies, with Y cables used on the tribs.
• For higher capacities, traffic from the standby IDU is routed to the online
IDU to support termination of up to 40xE1 or 32xDS1 tribs. In this
configuration trib and PSU protection is not supported, however RAC/ODU
and path protection functions are retained.
• Tx switching is not hitless.
• Rx path switching (voting) is hitless (errorless) for capacities to 20xE1 /
16xDS1. It is not hitless when configured for 40xE1 / 32xDS1 operation.
Application Variant Capacities Modulation
E1/DS1 IDU 20x 5xE1 to 75xE1, or 4xDS1 to
100xDS1
QPSK to 128QAM
STM1/OC3 IDU 155o STM1/OC3 (optical SC interface) 16/64/128QAM
Ethernet IDU ES 10/100Base-T to 200 Mbps with up
to 8xE1/DS1
QPSK to 128 QAM
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