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Table Of Contents
VISM and VISM-PR Release 3.2 Specifications
VISM Card Physical Interface Specifications and Applicable Standards
VISM Card Counters Specifications
VISM and VISM-PR Release 3.2 Specifications
This section contains the following topics:
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VISM Card Physical Interface Specifications and Applicable Standards
VISM Card Specifications
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ATM layer: Per ITU standards I.361 and ATM UNI v3.1
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AAL layer: AAL5 as per standard I.363.
VISM Card Physical Interface Specifications and Applicable Standards
Physical Layer Interface T1:
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Line Rate: 1.544 Mbps +/- 50 bps.
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Line Interface Connector: Balanced 100-ohm RJ-48C.
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Synchronization: The transmit clock can be selected from either the looped clock or the node's clock.
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Line Code: Bipolar 8 zero substitution (B8ZS) per ANSI T1.408 and AMI.
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Line Framing: Extended Superframe Format (ESF 24-frame multiframe) per ANSI T1.408.
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Input Jitter Tolerance: Per ATT TR 62411.
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Output Jitter Generation: Per ATT TR 62411 using normal mode synchronization.
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Physical Layer Alarms: LOS, LOF, AIS, RAI.
Physical Layer Interface E1:
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Line Rate: 2.048 Mbps +/- 50 bps.
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Line Interface Connector: Balanced 120-ohm RJ-48C, Unbalanced 75-ohm SMB.
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Synchronization: The transmit clock can be selected from either the looped clock or the node's clock.
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Line Code: HDB3 (E1) and AMI.
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Line Framing: 16-frame multiframe per G.704.
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Input Jitter Tolerance: As specified in ITU G.723 for 2.048 Mbps.
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Output Jitter Generation: As specified in ITU G.723 for 2.048 Mbps.
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Physical Layer Alarms: LOS, LOF, AIS, RAI.
General VISM Card Standards
Card Status Indicator LEDs:
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Active (Green)
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Standby (Orange)
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Fail (Red)
Line status indicator LEDs:
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Active and Okay (Green)
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Active and Local Alarm (Red)
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Active and Remote Alarm (Orange)
Maintenance/Serviceability Features: Internal loopbacks, hot-pluggable.
VISM Front Card:
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AX-VISM-8T1/8E1—7.25 x 16.25 inches
VISM Line Modules:
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AX-RJ48-8T1-LM—7.0 X 4.5 inches
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AX-R-RJ48-8T1-LM—7.0 X 4.5 inches
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AX-RJ48-8E1-LM—7.0 X 4.5 inches
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AX-R-RJ48-8E1-LM—7.0 X 4.5 inches
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AX-SMB-8E1-LM—7.0 X 4.5 inches
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AX-R-SMB-8E1-LM—7.0 X 4.5 inches
Total VISM Power:
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48 VDC (100W estimated)
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5 VDC (25W estimated)
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3.3 VDC (43W estimated)
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2.5 VDC (12W estimated)
VISM Card Counters Specifications
T1/E1 Framers:
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OOF Count
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LCV Count
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FER Count
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CRC Error Count
RTP/RTCP:
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Number of packets received
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Number of packets transmitted
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Number of error packets received
ATM Cells:
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Number of cells transmitted to cellbus
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Number of cells discarded due to intershelf alarm
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Number of cells transmitted with CLP bit set
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Number of AIS cells transmitted
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Number of FERF cells transmitted
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Number of end-to-end loop-back cells transmitted
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Number of segment loop-back cells transmitted
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Number of cells received from cellbus
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Number of cells received with CLP bit set
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Number of AIS cells received
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Number of FERF cells received
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Number of end-to-end loop-back cells received
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Number of segment loop-back cells received
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Number of OAM cells discarded due to CRC-10 error
Diagnostics:
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Header of last cell with unknown LCN
VISM-PR Card Specifications
This section describes the card specifications that are unique to the VISM-PR card.
VISM-PR Card Features
The following features are contained in the VISM-PR card:
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Voice processing for all channels, using the following:
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Echo cancellation (ECAN)
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Digital Signal, level 0 (DS0) channels
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G.711u
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G.711a
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G.726-32K
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G.729a
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G.729ab
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Clear channel
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G.726-16K
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G.726-24K
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G.726-40K
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G.723-H
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G.723a-H
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G.723.1-L
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G.723.1a-L
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Tone detection and generation
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High functionality negotiated on demand for channels using the following:
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Adaptive Differential Pulse Code Modulation (ADPCM)
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Code Excited Linear Prediction (CELP)
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Multiple packetization format in the following modes:
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Voice over IP (VoIP) switching/trunking
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VoIP with Real-time Transport Protocol (RTP) in AAL5
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Switched AAL1 switched virtual circuits (SVC)
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Switched AAL2 SVC
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Switched AAL2 PVC
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AAL2 trunking
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VoIP and Switched ATM AAL1 SVC
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High-density aggregation, providing the following:
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8 T1/E1s of PCM voice
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192 T1 or 248 E1 DS0s per VISM-PR card
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4608 T1 or 5952 E1 DS0s per chassis shelf
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13824 T1 or 17856 E1 DS0s per rack (3 MGX 8000 series switch chassis per rack)
See Chapter 2, "Overview of the VISM and VISM-PR Cards" for information about installing and using VISM and VISM-PR cards in your MGX 8000 series switch chassis.
Posted: Thu Jun 10 16:30:43 PDT 2004
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