SX-200 General Information Guide
234
Revision A
50003510
Critical Alarm
For each alarm category, the thresholds represent the alarm level trip points; that is, the precise
divisions between the alarm levels. The thresholds are simple percentages, indicating
availability: the number of working devices is compared to the number of programmed devices.
The Critical Alarm threshold is not a percentage, but is a precise numerical value. When the
number of available devices falls below this number, a critical alarm is raised.
Cross-Connect Field
See Main Distribution Frame, page 238.
Custom Local Area Signaling Service
An SX-200 EL/ML system permits advanced voice features such as Calling Line ID digits and
CLASS Name to accompany or precede the telephone call across multiple switches.
Customer Data Entry (CDE)
Customer data entry (CDE) is the process employed when data particular to a specific customer
installation is entered into the SX-200 EL/ML system. This data includes such things as
numbering plan, ARS routings, and trunk descriptors. CDE is entered into the SX-200 EL/ML
system by the maintenance/CDE terminal.
D Channel
The D Channel is the 16 K bit/s control channel of a DNIC device.
DCE
See Data Communication Equipment, page 235.
DID
Direct inward dialing.
DIL
Direct-in line.
DOD
Direct outward dialing.
DSP
Digital Signal Processor.
DTE
See Data Terminal Equipment, page 235.
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