Product Overview
The VCL-MX Version 6 DXC 80 T1, 120Mbps Digital Access Cross Connect
Switch, is a modular switch that may be scaled from 8 T1 Ports to up to 80
T1 Ports. The VCL-MX Version 6, T1 DACS (T1 DXC) offers full cross-connect
functionality to cross-connect between 64Kbps time-slots (DS-0s), “n"x64
Kbps consecutive DS-0s and Fractional T1 channels to full T1 channels.
The VCL-MX Version 6 DXC 80 T1, 120Mbps Digital Access Cross Connect
Switch, occupies 6U high (266 mm) rack-space and is a complete 19-inch
standalone unit that provides a 64Kbps time-slot (DS-0) cross-connect
fabric for up to 80 T1 ports. This product offers 1+1
-48V DC Power Supply
Redundancy, 1+1 Control Card and Processor Redundancy, 1+1 Cross-Connect (TSI)
Redundancy, 1+1 Timing (Synchronization Clock Circuitry) Redundancy. This
DXC offers “user selectable” clock / timing synchronization priority. The
Dual Power Inputs allow the equipment to be powered from two separate
power sources. AC input external adapter is an optional for AC mains
operation.
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Key Features and Highlights
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 120Mbps, 80 T1 fully non-blocking cross-connect at 64Kbps (DS-0) level
(1920 DS-0 any to any time-slot cross-connect)
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Scalable from 8 T1 Ports to 80 T1 Ports
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1+1 Control Card Processor Redundancy
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1+1 Cross-Connect / TSI Redundancy
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1+1 Timing (Synchronization Clock) Redundancy
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1+1 -48V DC Power Supply Redundancy (Dual Power Input allows the equipment
to be powered from two separate -48V DC sources)
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Bit Error Rate (BER) monitoring BER thresholds to generate BER alarms
automatically whenever alarm limits are exceeded
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Telnet remote access
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SNMP traps
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Maintains Access Security Log
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USB and RS232, Interface for local connection through the serial interface
to the "Network Control and Management Software”
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User Selectable Internal, External and Loop-timed clock synchronization
priority options
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Local and remote loopback facility.
OAM Features
OAM: Operation and Management Ports
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RS232 Serial Port
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USB COM Port
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10/100BaseT Ethernet for remote access.
Security and Protection
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Secured Access via SSH V2
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Password Protection: Password Protection in compliance with the mandatory
clauses of the GR-815-CORE-2 specifications for secured access control.
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Logging: Maintains a log of all successful and un-successful attempts.
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Logged information includes the ID and the IP address of the accessing
entities.
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Alerts the administrator if the un-successful logging attempts exceed
three.
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Security Audit: All access logs for up to 30 days are maintained for
security audit purposes.
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Security log entry of any request or activity including that user-ID
(including IP address, if applicable), to establish user accountability.
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Report Generation / Audit Trail.
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Security Administration.
Timing (Clock) Synchronization
| Timing Options |
Internal Clock, Loop-Timed Clock, External Clock. User
selectable synchronization priority |
| Synchronization Sources |
Internal Clock, span clock timing derived from
incoming T1 links (Loop-Timed), External Clock, 75 Ohms (TTL), or
1.544 Mbps (100 Ohms BITS clock) |
| Default Option |
Internal Clock |
System Architectural Details
VCL-MX Version 6, is a scalable DXC that may be used to cross-connect at
DS-0 (64Kbps time-slot level) from 8 T1 Ports to 80 T1 Ports (120Mbps).
The VCL-MX Version 6 DXC has a multi-slot chassis with TDM backplane. In
the chassis, there are ten (10) T1 interface card slots. Each T1 Interface
Card has 8 T1 Ports.
Two slots are reserved for 1+1 redundant control cards, which includes the
redundant cross connect, processor, TSI and clock synchronization / timing
functions. One dedicated slot exists for an OAM card and two slots for 1+1
redundant power supply cards.
Chassis / System Backplane
All connections are made at the rear of the chassis, providing
interconnections between the various plug-in cards and to the network.
VCL-MX Version 6 - 80 T1, 120Mbps Digital Access Cross Connect Switch
supports high-density T1 interface cards.
An extensive set of alarms, for easy maintenance are provided in the
system.
System Management
VCL-MX
Version 6 – 80 T1, 120 Mbps Digital Access Cross Connect Switch offers a
variety of management options. The equipment may be configured using CLI
(English text) commands, or a GUI (Graphical User Interface). The
management and configuration commands may be executed from a VT100
terminal, Windows HyperTerminal, any DOS-based system, Linux or UNIX
based system, or Telnet (remote configuration and management).
The equipment provides a wide choice of access ports for connecting to
and executing management and configuration commands through its OAM
Card.
The OAM card provides
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COM Port (RS232 Serial Port).
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USB Port
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10/100BaseT Ethernet Port (each multiplexer may be assigned an IP
address and connected to a LAN / IP network for remote access and
management through the 10/100BaseT Ethernet Port for out-of-band
configuration, management and access).
Status Monitoring
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Synchronization Clock Selection
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Status of alarms
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Enabled/Disabled status of 1.544 Mbps T1
ports
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Monitoring the 80 Port T1 DACS status and
configuration
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Monitoring of T1 Link status: LOS, LOF, AIS,
RA
Alarm status and monitoring
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Loss of incoming signal at all 1.544 Mbps T1
Ports
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Configuration error alarm
LED indications
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1 to 80 T1 Ports LED indicators
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5V DC present
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-48V DC present
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Configuration error.
External Alarm - Contact Closures
Application Diagram
Other Related Links
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