Atec Agilent-J2300E - Manual (Page 73)

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ATM25 (25.600 Mb/s) J3766A
General
This interface comprises a plug-in module (J3766A) suitable for plugging into
the J2300E Agilent Advisor mainframe and J2900A High Speed undercradle.
Common to Inputs and Outputs:
Main Specifications: ATM Forum af-phy-0040.000, ITU-T I.432.5
Ports: Two bi-directional, one towards the equipment and the other towards
the network: 100 Ohm (for UTP-3 cable) and 120 Ohm (for UTP-5 cable)
Test configuration modes:
Terminal (towards network or equipment) and Monitor (both directions for
protocol analysis with repeater functionality in each direction)
Connectors: RJ-45 (UTP)
Line Code: NRZI
Symbol Coding: 4B5B
Line Symbol Rate: 32 Mbaud
Cell Mapping: Symbolic direct (i.e. no framing)
Cell Scrambling: Conforms to af-phy-0040.000 (x 10 + x 7 + 1)
Inputs:
Physical Layer Alarms and Statistics:
Invalid symbol
Short cell
Loss of signal (LOS)
Loss of Timing Synchronization
Timing synchronization frequency
ATM Layer Statistics:
Auto-discovery of up to 1024 VCs and collection of statistics on each
Average utilization in percent
Instantaneous utilization in percent
Maximum utilization in percent
Total cells received
Idle/unassigned cells received
Busy (assigned) cells received
Header (“HEC”) errors
ATM QoS measurements (to ITU-T O.191):
ATM traffic contract conformance (policing) measuremets
Capture buffer size: 64 Mbyte (approximately 1,000,000 cells)
Capture buffer timestamp resolution: 100 ns
Capture rate: Full line rate
Analyze bit error ratio (BER) patterns in the ATM cell payload:
1111, 1010, 1100, PRBS 2 15 - 1, PRBS 2 20 - 1, PRBS 2 23 - 1
Outputs:
QoS and X8 timing source:
Recovered from line (loop), recovered
from X8 8 kHz time synchronization
source, and internal
Internal clock rate accuracy: +/- 50 ppm
Optional generation of X8 8 kHz time synchronization symbol pair
Simulate network or user equipment
Generate ATM Test Cell traffic (to ITU-T O.191) shaped to traffic contract
Generate bit error ratio (BER) patterns in the ATM cell payload:
1111, 1010, 1100, PRBS 2
15 - 1, PRBS 2 20 - 1, PRBS 2 23 - 1
ATM and WAN Interface
Specifications
(continued)