General DataComm SpectraComm 553 Installation & Operation Manua page 11

Network/Cascade Cyclic Redundancy Checksum
Network/Cascade Received Yellow
Network Low Average
Timing Loss..................................................................................................................... C-3
Channel Alarms..................................................................................................................... C-3
DCD Loss
DSR Loss......................................................................................................................... C-3
DTR Loss......................................................................................................................... C-3
External Transmit Timing
Receive Data No
Transmit Data No Transitions
Other Alarms......................................................................................................................... C-3
EEPROM Checksum
Unit Failure...................................................................................................................... C-4
Unsolicited
Power Up
Configuration Change
Top Supply Fail
Bottom Supply
Remote Not
Redundant Mode
Appendix D:Timing Options
Overview............................................................................................................................... D-1
Timing Option
Slave Timing
Internal Timing............................................................................................................... D-4
Channel Timing (External/DTE Timing)
Cascade Timing
Station Timing
Typical Network Applications
Back-to-Back Application
PBX Application
076R155-000
Issue 7
................................................................................ C-2
Density....................................................................................... C-3
........................................................................................................................ C-3
Loss....................................................................................... C-3
Transitions........................................................................................... C-3
......................................................................................... C-3
Error.............................................................................................. C-3
Test............................................................................................................... C-4
......................................................................................................................... C-4
..................................................................................................... C-4
............................................................................................................... C-4
Fail.......................................................................................................... C-4
Responding.................................................................................................. C-4
............................................................................................................. C-4
Descriptions.................................................................................................. D-1
...................................................................................................................D-3
............................................................................................................... D-6
................................................................................................................. D-9
............................................................................................ D-10
............................................................................................. D-10
........................................................................................................... D-12
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
.......................................................... C-2
....................................................................... D-5
Table of Contents
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