Atec Agilent-J2300E - Manual (Page 65)

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ISDN Primary Rate Interface (PRI) E1 (2.048 Mb/s) J4646A and J4647A
General
This interface comprises a choice of two plug-in modules (J4646A and J4647A)
suitable for plugging into the J2300C/D/E Agilent Advisor mainframe and the
J2900A High Speed undercradle. The J4646A has 75 Ohm BNC connectors;
the J4647A has RJ-45 and DB-9 connectors, which with converter cables, can
connect to 120 Ohm Small Siemens connectors. The modules handle ISDN,
PPP, Async PPP, Multi-link PPP and BERT.
Common to Inputs and Outputs:
Connectors:
J4646A: unbalanced 75 Ohm BNC female
J4647A: balanced 120 Ohm DB-9 and RJ-45
Line Code:
HDB3, AMI
Electrical:
ITU-T G.703
Framing:
ITU-T G.704 alternate framing with or without CRC-4
Fractional channel, any multiple of 64 kb/s channel
Unframed at 2.048 Mb/s
Inputs:
Two ports
Levels:
ITU-T G.703
Monitor modes:
Terminated, 75 Ohm unbalanced (J4646A)
Monitor Jack -20 dB and -30 dB
Terminated, 120 Ohm balanced (J4646A)
Bridged (High Impedance)
Physical Layer Alarms and Statistics:
Loss of Signal (LOS)
Loss of Frame (LOF)
Alarm Indication Signal (AIS)
Remote Alarm Indication (RAI)
Line code violations
CRC-4 errors (if CRC-4 is selected)
Frame alignment error
Capture buffer size: 28 Mbyte
Capture buffer timestamp resolution: 100 ns
Capture rate: Full line rate
ATM and WAN Interface
Specifications
(continued)
Outputs:
Two ports, 75 Ohm unbalanced (J4646A) or 120 Ohm balanced
(J4647A)
Levels:
ITU-T G.703
Clocking:
Recovered (loop), Internal and External (using other receiver input)
Internal clock rate accuracy:
+/- 50 ppm
Generation of bit error ratio (BER) patterns in the physical layer
frame payload:
PRBS 2 15 - 1, PRBS 2 20 - 1, PRBS 2 23 – 1
Transmission of 64-bit BER user pattern