3Com MSR 50, MSR 30 manual Threshold, Example # Enable payload scrambling on interface POS 1/0, 159

159

View POS interface view

Parameter None

Description Use the scramble command to enable payload scrambling on the POS interface.

Use the undo scramble command to disable payload scrambling.

By default, payload scrambling is enabled.

You may configure payload scrambling to prevent the presence of excessive consecutive 1s or 0s to facilitate line clock signal extraction at the receiving end.

n Only when POS interfaces on both ends are enabled with payload scrambling can they be connected successfully.

Example # Enable payload scrambling on interface POS 1/0.

<Sysname> system-view

[Sysname] interface pos 1/0

[Sysname-Pos1/0]scramble

threshold

Syntax threshold { sd sf } value

undo threshold { sd sf }

View POS interface view

Parameter value: Integer in the range 3 to 9.

Description Use the threshold command to set the SD (signal degrade) threshold or SF (signal fail) threshold for a POS interface.

Use the undo threshold command to restore the default.

If you execute the threshold command with the value argument set to X, the value of the threshold specified can be obtained using this expression: 10e-X.

By default, SD threshold is 10e-6 (that is, X is 6), and SF threshold is 10e-3 (that is,

Xis 3).

SD and SF alarms are used to indicate the current line performance. The bit error rate threshold of SF is higher than that of SD, meaning when small amount of errors occurs, SD alarms are generated; while when error rate is increased to a certain degree, SF alarms are generated, indicating the line performance is degrading seriously.

Note that SD threshold should be smaller than SF threshold.

Currently, this command is not supported.