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Multiplexer
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R-STM-1E
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Features |
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SDH transmission solution for access
networks, expands local loops to 60 km/37 miles
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Low power consumption and high
reliability optimized for installation in outdoor cabinets
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Flexible configuration as an STM-1
terminal or Add&Drop Multiplexer (ADM) with full
cross-connectivity and PDH interfaces
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Supports centralized management,
including configuration, service, performance, security and
fault management
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Integrated management system also
supports Multiservice Access Platform (MAP) equipment
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Accurate transfer of timing to access
equipment
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Low cost per line
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Flexible configurations
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Description |
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R-STM-1E is a Synchronous Digital
Hierarchy (SDH) multiplexer for deployment in the local
loop.
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R-STM-1E can be deployed in access
nodes as a Terminal Multiplexer (TM) or an Add & Drop
Multiplexer (ADM). It enables expansion of the local loop up
to 60 km/37 miles, creating a transmission layer fully
compatible with regional and national SDH networks.
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R-STM-1E is available with either
standard G.703 coaxial or fiber optical short/long haul
aggregate interfaces.
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The SDH transmission supports a full
range of access systems, including Remote Subscriber Units (RSUs),
Digital Line Carriers (DLCs), Digital Cross-Connect (DACS),
and service multiplexers.
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R-STM-1E is fully compatible with 34
Mbps (E3) and 45 Mbps (T3) PDH signals, SDH microwave radio
relays, and existing SDH infrastructure.
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R-STM-1E supports the whole range of
SDH network topologies:
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The interface capacity of R-STM-1E
can be expanded from its 21x2 Mbps basic configuration by
adding extension modules (ordering options), to any of the
following:
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63x2 Mbps (63xE1)
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3x34 Mbps (3xE3)
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3x45 Mbps (3xT3)
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DXC-STM-1, a hybrid unit combining
the R-STM-1E multiplexer and the DXC digital cross-connect
in a single integrated chassis, is also available. It
features both DXC 1/0 cross-connect and SDH ADM capabilities
(see the DXC-STM-1 folder).
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The compact size and low power
consumption of R-STM-1E allow easy rack or wall installation
on customer premises, in telecommunications buildings, or in
outdoor cabinets.
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A comprehensive array of installation
accessories support vertical/horizontal rack installation,
wall mounting, etc.
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R-STM-1E features a centralized
management application, to facilitate management of the
access network. The application combines both the powerful
RADView and the SDH transmission layer network management
applications. The centralized network management application
uses embedded management channels for communication with
remote access equipment. Centralized management enables the
building of flexible, responsive and optimized SDH access
networks to fit any customer's needs.
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The 2 Mbps output signals of R-STM-1E
can be resynchronized by the R-STM-1E multiplexer clock. In
addition, pointer justification events can be filtered out,
eliminating phase hits. This creates an accurate signal,
clear of phase hits and suitable for synchronization of
access equipment. Since the SDH network is usually
synchronized by the national synchronization network, this
accurate timing is transferred to the access equipment
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Email
