Specifications

Chapter 1 Introduction Installation and Operation Manual
1-2 Overview ASMi-54C LRS-102 Ver. 2.0
ASMi-54C modules can also be used to interconnect different LRS-102 units by
means of SHDSL links. In this case, one ASMi-54C module must be configured to
operate in the STU-C (central) mode, and the other ASMi-54C module(s) must be
configured to operate in the STU-R (remote) mode. The traffic handling
capabilities are similar to what is available with ASMi-54 standalone modems.
In the configuration shown in Figure 1-1, each ASMi-54C module operates
independently, to provide the ASMi-54 standalone modem connected to it access
to Ethernet services, for example, to metro Ethernet networks, at the Fast
Ethernet level. Therefore, for Ethernet traffic, each ASMi-54C module effectively
operates as a modem with an internal Ethernet switching subsystem.
The internal Ethernet switching subsystem enables configuring multiple flows
within the ASMi-54C, to filter the traffic flowing between each ASMi-54C Ethernet
port and the attached ASMi-54 modem in accordance with the user’s application
requirements. ASMi-54C internal Ethernet switching subsystem is flexible enough
to enable configuring traffic flows between the different ASMi-54 standalone
modems connected to the same module.
Figure
1-1. Typical ASMi-54C Application
Features
SHDSL Transport
ASMi-54C uses the SHDSL.bis version of the Symmetrical High-speed Digital
Subscriber Line technology, as standardized in ITU-T Rec. G.991.2. This
recommendation supports variable, extended, payload data rates up to
5.696 Mbps (5.7 Mbps line rate) on a single unloaded and unconditioned twisted
copper pair, of the type used in the local telephone distribution plant.
Note