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Diagnostics
CSU Compatibility
T1 compatibility
Line code
Consecutive zeros
Average pulse density
Keep Alive signal
Framing format
Alarms and status conditions
TECHNICAL INFORMATION
TECHNICAL CHARACTERISTICS (Cont.)
Item
Electrical (Cont.)
A-3
Characteristic
DS1 Line Loop, DS1 Local Test, DS1 Local Test with Self-
Test, DS1 Network Interface Loopback, DS1 Network In-
terface Loopback with Self-Test, DS1 Remote Test, DS1
Remote Test with Self-Test, DS1 Self-Test, DS1 Test Loop,
DS0 Circuit Delay Measurement Test, DS0 Remote Test, DS0
Remote Test with Self-Test, DS0 Self-Test
WECO 551
AMI with no bipolar violations, and B8ZS
15 or 39 maximum
Minimum 1 "one" per 8 bits, or 24 "ones" per 192 bits
Type 1 (consecutive ones)
D4 Superframe Format and Extended Superframe Format
(ESF), with automatic conversion
Out of Frame (OOF), Alarm Indication Signal (AIS or Blue
alarm), Loss of Signal (LOS), and Yellow alarm
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