Output Module Reference Data
E1 Output Module
174 SSU-2000 User’s Guide 12713020-002-2 Revision D – April 2004
E1 Output Module
This section provides user-reference data for the E1 Output module (part number
23413018-000-0) that is used in both the SSU-2000 main shelf and in the optional
SDU-2000 Expansion shelf.
Functional Overview
The E1 Output module uses one of three 4 kHz clocks from the SSU-2000 main
chassis backplane to generate a phase-locked signal of 2.048 Mbps. If the unit is
inserted into an SDU-2000 expansion shelf, a fourth 4kHz clock (D-clock) is
available. The phase-locked 2.048 Mbps signal is used to generate a set of 20
output signals for distribution to large networks.
A microcontroller unit on the E1 Output module communicates with other boards in
the main shelf and performs Output module configuration. The module’s memory
subsystem (EEPROM, RAM and serial EEPROM) stores the executable image, the
PLD image and other configuration and temporary information for an on-module
microprocessor.
The E1 Output modules may be used individually or configured for operation as
redundant pairs in the shelf.
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