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E3, 2/34Mbps PDH Multiplexer -
Technical Specifications
 The Valiant E3, 2/34Mbps
multiplexer is a third order skip multiplexer / demultiplexer unit, based on PDH
(Plesiochronous Digital Hierarchy) technology. It multiplexes 16, 2.048Mbps E1 tributaries
into a single 34.368Mbps E3 tributary. The multiplexer / demultiplexer also does the
reverse processing i.e. demultiplexing a received 34Mbps stream into 16, 2Mbps E1
tributaries.
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Technical
Specifications: Electrical
Interface:
| Specification. |
2MBit/Sec
Port |
34MBit/Sec. Port |
| Bit rate |
2048 KBits/Sec. |
34368 KBits/Sec. |
| Tolerance |
± 50ppm. |
± 20ppm. |
| Interfaces |
16, G.703 |
1, G.703 |
| Frame Structure |
as per G.704 |
as per G.751 |
| Line Code |
HDB3 |
HDB3 |
| Signal Level |
2.37 V/ 3.0 V p |
1.0 V p |
| Impedance |
75 W Un-Balanced, 120 W
Balanced |
75 W Un-Balanced |
| Permissible Attenuation |
6 dB at 1024 KHz. |
12 dB at 17184 KHz |
| Connectivity |
RJ45 connector (120 Ohms) |
BNC connector (75 Ohms) |
| Cable |
120 W
balanced |
75 W unbalanced |
| Power Supply |
Input: -40 to -60 VDC |
| Temperature |
-10°C to 50°C |
| Dimensions |
19 inch, DIN 2U height,
480 mm (width), 260 mm (depth). |
| Net Weight |
4.30 Kgs. |
Features
- Single - card implementation
- Plug and Play Multiplexer
- Modular 2Mbps transmission units
- Standard CCITT (ITU-T) compliant interfaces
- Capable of synchronizing on any of the 34368 kHz clock sources
- internal, external or extracted
- TCP/IP Remote Access for monitoring alarms and management
- Remote (TCP/IP) and local (RS232) terminal monitoring and
control by Network Management System
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- Highlights
- Extensive alarms and status indication facility
- Service bit monitoring and insertion
- Operates on nominal -48V DC input
- Distributed on-board power supply
- Microprocessor controlled with powerful diagnostic facilities
for both remote and local systems
- Local and remote loopback facility for 34Mbps stream
- Stored program controlled
- Highly reliable and compact
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External
Interfaces
VCL-E3 unit provides the following interfaces
to the external world:
- 16, primary rate, 2Mbps, 120 Ohms balanced interface
- 1, third order, 34Mbps, 75 Ohms un-balanced interface
- -48V input for VCL-2/34 on-board power supply
- RS232 / 10BaseT interface for connection to Network Management
System, used for configuration and monitoring of the VCL-2/34 multiplexer.
- NO/NC Dry contact relay alarm
Application Diagrams
Programming and Monitoring
VCL-2/34 Mbps Multiplexer offers
programming via an RS232 port for control and monitoring of the terminals.
Programming Features
- Presence or absence of remote terminal
- Status of alarm(s)
- Specifying the priority sequence for clock selection
- Setting local or remote loopbacks on 2Mbps or 34Mbps
- Enabling or disabling 2Mbps channels
- Initiating self tests
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Status Monitoring
- Priority sequence of clock selection and current clock on
which the system is working
- Presence or absence of loop-back on 34Mbps and 2Mbps streams
- Enabled / disabled status of 2Mbps channels
- Master / Slave status
- Monitoring healthy / unhealthy state of microcontroller and
2Mbps line interface units
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