Command Reference Guide

302 ● shdsl rate 3Com Router 5000 Family and Router 6000 Family
Command Reference
shdsl rate
Purpose Use the shdsl rate command to set single-pair interface rate of the SHDSL
interface or just select auto-negotiation mode. You can specify maximum line rate.
Use the undo shdsl rate command to restore the default.
Syntax shdsl rate { auto | rate }
undo shdsl rate
Parameters auto
Auto-negotiation mode, which is the default.
rate
Sets maximum single-pair rate of the G.SHDSL
interface, in the range 192 kbps to 2,312 kbps.
■ For four-wire (dual-pair) G.SHDSL, interface rate is two times that of single-pair
rate. For example, if you set single-pair rate to 2,312 kbps, four-wire interface rate
is 4,624 kbps.
■ Because four-wire G.SHDSL interfaces cannot negotiate rate, do not set their
single-pair interface rate to auto mode.
Default By default, the rate of two-wire G.SHDSL interface is set to auto-negotiation mode;
the single-pair interface rate of four-wire G.SHDSL interface is set to 2,312 kbps
(four-wire G.SHDSL interface rate is 4,624 kbps).
Example Restore the auto-negotiation mode on the interface.
[3Com -Atm1/0/0] undo shdsl rate
View This command can be used in the following views:
■ ATM (G.SHDSL) Interface view
Description You can set the line rate in the range 192 to 2,312 kbps in steps of 64 kbps. The
overload displayed in interface view includes an additional 8 kbits.
In actual applications, likelihood exists that maximum downlink rate could not reach
the specified rate as restricted by ATU-C and line conditions. If you select the auto
mode, the CPE and CO can negotiate a rate commensurate with the current line
condition during the activating process. If fixed rates are set at the two ends, the two
parties negotiate rate. In case the lower rate between them cannot be provided, the
line could not be activated.