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