Knowing The T1/PRI Specifications
Capacity
10 T1/PRI boards
Modes
Super-frame, extended super-frame
Framing
D4
Channels Allocated
24
Industry Standards
ANSI T1.403-1989
AT&T PUB 62411
CCITT 0.921
CCITT 0.931
Maximum Output
2.4V to 3.6V base to peak, short circuit
protection to 120 mA, rms
Line Rate
1.544 Mbps
Line Code
Type
Bipolar AMI
Zero Suppression
B8ZS
Receive Sensitivity
-26 dB or -36 dB selectable
Impedance
100 Ohms
DXP Loss Insertion
Transmit
-6 dB (selectable to 0 and -3 dB per channel)
Receive
0 dB
Connector
RJ48C, miniature 8-position, shielded
(per ANSI T1-403, 1989)
Cable
Up to 6,000 feet between DXPs, 22 AWG,
twisted-pair, no external components
CSU Function
Built-in; CPE or CARRIER selectable
Transmit Attenuation
Manual
0, -7.5, -15, or -22.5 dB selectable
Automatic
Default
Input Jitter Tolerance
138 UI @ 1 Hz; 0.4 UI @ 10 KHz—100 KHz
(0 dB line); corner frequency = 6 Hz (attenuates
20 dB per decade above corner)
Surge Protection
1 AMP fuse and transient protection for metallic
>6 volts P-P; Longitudinal (tip—ring and chassis
ground) protection 1500 volts minimum.
Elastic Store
Two frames, no frame loss when slipping
Compliance
FCC Part 68/Doc
FCC Part 15
UL-1489/CSA (safety)
USOC = 6.0Y
FIC = 04DU9–1SN
Yellow Alarm Type
Alternating bytes = all zeros and all ones;
(prohibiting ANSI FDL messaging during
yellow alarms is selectable)
Clocking
Synchronization
Slave mode from DXOPT-SYN card on
Auxiliary board
Min. RX Freq. Capture
1.544 MHz
±
200 Hz, T1 board;
16.384 MHz
±
2048 Hz, Sync card
TX Master Mode Freq.
1.544 MHz
±
75 Hz
Loop back Modes
Extended Super-frame Mode Local, remote, payload loop back (manual)
FDL ANSI network remote loop back
FDL ANSI network payload loop back
LED Alarms/Errors
Status
Red Alarm
Yellow Alarm
Blue Alarm
Loss of receive synchronization
Loss of signal
Bipolar error(s)
CRC errors (ESF)
Slip errors
Phase Lock error
Installing And Programming The DXPRI Card
IMI89–255
Knowing The T1/PRI Specifications – 39
Содержание DXP Plus Series
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