Cisco Systems 7304 manual Verifying Scramble Configuration, 13-11, Scrambling is enabled

Chapter 13 Configuring the 2-Port and 4-Port T3/E3 SPAs

Configuration Tasks

Scrambling can prevent some bit patterns from being mistakenly interpreted as alarms by switches placed between the Data Service Units (DSUs).

To configure scrambling, use the following commands:

Command	Purpose
Router# configure terminal	Enters global configuration mode.
Router(config)# interface serial slot/subslot/port	Selects the interface to configure.
	• slot/subslot/port— Specifies the location of the
	interface. See the: “Specifying the Interface
	Address on a SPA” section on page 13-5
Router(config-if)# [no] scramble	Enables scrambling. Scrambling is disabled by
	default.
	• scramble—Enable scramble.
	• no scramble—Disable scramble.
	Note When using framing bypass, no
	scrambling must be configured.

Verifying Scramble Configuration

Use the show controllers serial command to display the scrambling setting:

router# show controllers serial 6/0/0 Serial6/0/0 -

Framing is c-bit, Clock Source is Line

Bandwidth limit is 44210, DSU mode 0, Cable length is 10 rx FEBE since last clear counter 2, since reset 0

Scrambling is enabled

Data in current interval (356 seconds elapsed):

0 Line Code Violations, 0 P-bit Coding Violation 0 C-bit Coding Violation

0 P-bit Err Secs, 0 P-bit Sev Err Secs

0 Sev Err Framing Secs, 0 Unavailable Secs

0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs Data in Interval 1:

0 Line Code Violations, 0 P-bit Coding Violation 0 C-bit Coding Violation

0 P-bit Err Secs, 0 P-bit Sev Err Secs

0 Sev Err Framing Secs, 0 Unavailable Secs

0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs

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	Cisco 7304 Router Modular Services Card and Shared Port Adapter Software Configuration Guide
OL-4807-02		13-11