Network Router User Manual

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