2 dual t1 network line interfaces, 3 line codes, 4 framing – Carrier Access Access Bank II SNMP User Manual
Page 31: 5 clock source, 6 t1-to-t1 delay, 7 t1 channel service units (csus), 2 dual t1 network line interfaces -2, Total bandwidth -2, Ds-1 output signals -2, 3 line codes -2
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3.2 Dual T1 Network Line Interfaces
3.2.1 Total Bandwidth
•
3.072 Mbps
3.2.2 DS-1 Output Signals
•
Pulse amplitude: 2.0 V to 3.6 V ±60 Hz variations
•
Line Rate: 1.544 Mbps ±50 bps
•
Format: T1 type bipolar (except where intentional BPVs are introduced by B8ZS line
coding)
3.3 Line Codes
•
AMI or B8ZS and line code conversions between T1 lines
3.4 Framing
•
D4 (Superframe) or ESF and framing format conversions between T1 lines
3.5 Clock Source
•
Loop Timing: Selectively recovered from incoming T1 Span 1 or Span 2
•
Master Clock: Internal Enhanced Stratum 4E Crystal Oscillator ±32 ppm accuracy)
3.6 T1-to-T1 Delay
•
Latency: 3 frames maximum (0.375 ms)
3.7 T1 Channel Service Units (CSUs)
•
Integrated intelligent CSUs support all standard diagnostic functions and DS-1 or DSX-1
signal levels from 0 to -30 dB
•
Software programmable Line Build Out (LBO): 0 dB/DSX (0’-133’) (default), -7.5 dB, -
15 dB, -22.5 dB, DSX (133’-266’), DSX (266’-399’), DSX (399’-533’), DSX (533’-
655’)
•
AT&T 54016 Maintenance Messages or T1.403 Performance Report Messages (PRMs)
through 4 Kbps ESF Facility Data Link (FDL)