G.shdsl Interface Configuration; Overview; Configuring A G.shdsl Interface - 3Com MSR 50 Series Configuration Manual

80 C 1: ATM
HAPTER AND
G.SHDSL Interface
Configuration

Overview

Configuring a G.SHDSL
Interface
DSL I C
NTERFACE ONFIGURATION
n
When executing the bootrom update file command, do not use the all option
unless absolutely necessary; use the part option instead. If you use the all option,
you will find it hard to roll back to the old version once the upgrade fails.
This section covers these topics:
"Overview" on page 72
■
"Configuring a G.SHDSL Interface" on page 80
■
G. single-pair high-speed digital subscriber line (G.SHDSL) is a symmetric
transmission technology that implements high-speed data transmission over the
twisted-pair copper wire by making use of the unused high frequency ranges with
different modulation methods. So far, two types of G.SHDSL are supported:
two-wire and four-wire. Two-wire G.SHDSL can provide transmission rates up to
2.312 Mbps while four-wire G.SHDSL can provide transmission rates up to 4.624
Mbps.
The transmission speed of G.SHDSL is susceptible to transmission distance and line
quality. While increased transmission distance means decreased line quality and
transmission rate, decreased transmission distance means the contrary. When
setting up a link, G. SHDSL can automatically make tuning for a reasonable speed
taking into consideration the actual line conditions such as distance and noise.
For the networking topology for the routers with G.SHDSL interfaces, refer to that
for the routers with ADSL interfaces. But note that G.SHDSL interface requires no
splitter.
For a typical network topology for routers with G.SHDSL interfaces, see
You should note that unlike ADSL, G.SHDSL does not use the splitter.
This section covers only the physical configurations of the G.SHDSL interface. For
more information about how to configure ATM (including PVCs), refer to
Configuration" on page
Follow these steps to configure a G.SHDSL interface:
To do...
Enter system view
Enter ATM interface view
Activate the G.SHDSL
interface
Set the G.SHDSL interface
standard
Set the wiring mode
127.
Use the command...
system-view
interface atm
interface-number
activate
shdsl annex { a | b }
shdsl wire { 2 |
4-auto-enhanced |
4-enhanced | 4-standard }
Figure
Remarks
--
Required
Optional
The interface is active by default.
Optional
Annex B is adopted by default.
Optional
4-enhanced mode by default
This command is available only if
the interface supports four-wire
G.SHDSL.
2.
"ATM