Access RAD ASMi-54 Installation And Operation Manual page 17

Chapter 1
Introduction
1.1
ASMi-54 is a standalone SHDSL modem with G.SHDSL.bis and EFM (Ethernet in
the First Mile) technologies that provides up to 22.8 Mbps of bandwidth.
ASMi-54 is a dedicated managed SHDSL modem that supports multiple data rates
and operates in full duplex mode over 2-wire, 4-wire, or 8-wire lines.
ASMi-54 uses TC-PAM 16 or TC-PAM 32 line coding SHDSL technology to transmit
up to 5.7 Mbps of bandwidth, point-to-point, over each copper pair with EFM
bonding. This enables each link to synchronize at a different rate and extends the
range of digital interfaces. This device offers longer distances and variable data
rates up to 5.7 Mbps over 2-wire, 11.4 Mbps over 4-wire, and 22.8 Mbps over
8-wire.
EFM bonding ensures that a failure or addition of a link does not drop the traffic
being transmitted over the other wires in the group, nor is the capacity of the
group decreased when a new link is added at lower rate. This is particularly
relevant for operators offering Ethernet services in the First Mile where fiber is
absent or impractical to install.
The ASMi-54 G.SHDSL.bis modem implements the IEEE's 802.1Q standards to
provide VLAN-tagging with four levels of prioritization, enabling carriers to offer
differentiated Ethernet services. VLAN tagging can also be employed to separate
traffic, ensuring transparency of the customer traffic and bolstering security of
management traffic.
ASMi-54 provides monitoring, control, and diagnostics of a local unit via a
supervisory port (Control).
Versions
Line Interface
ASMi-54 supports SHDSL twisted pair wire-line connection and can be ordered
with one of the following pairs of wires:
•
•
•
Unit Enclosure
ASMi-54 is available in a plastic or metal enclosure.
ASMi-54 Ver. 1.0
Overview
One pair (2-wire)
Two pairs (4-wire)
Four pairs (8-wire)
Overview 1-1