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Technical Characteristics
Item
T1 compatibility
Data encoding
Clear Channel Capability
Network interface
Consecutive zeros enforcement
Average pulse density enforcement
Keep Alive signal
Framing format
Alarms and status conditions
Diagnostics
076R155-000
Issue 7
AMI with no bipolar violations, and B8ZS
B8ZS
1.544 Mbps channelized DS1 in consecutive or alternate
DS0s (complies with AT&T 54019A specifications for FT1
transmission)
15 or 39 maximum
Minimum 1 "one" per 8 bits, or 24 "ones" per 192 bits
Type 1 (consecutive, framed ones filling the unused
bandwidth)
D4 Superframe Format, AT&T 54016 Extended Super-frame
Format (ESF), and ANSI T1.403 ESF, with automatic
format option
Out of Frame (OOF), Alarm Indication Signal (AIS or Blue
alarm), Loss of Signal (LOS), Red alarm, and Yellow alarm
DS1 Line Loop, with Self-Test; DS1 Local Test with Self-Test;
DS1 Network Interface Loopback, with Self-Test; DS1
Remote Test, with Self-Test; DS1 Self-Test; DS1 Test
Loop, with Self-Test; DS0 Circuit Delay Measurement Test;
DS0 Remote Test, with Self-Test; DS0 Self-Test; Channel
Digital Loop; Channel Remote Digital Loop, with Self-Test;
Channel Self-Test. Front panel test jacks for DS1 access
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
Specification
A-3
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