Command Reference Guide

SROS Command Line Interface Reference Guide DDS Interface Configuration Command Set
5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 489
data-coding scrambled
Use the data-coding scrambled command to enable the DDS OS scrambler to combine user data with
pattern data to ensure user data does not mirror standard DDS loop codes. The scrambler may only be used
on 64 kbps circuits without Frame Relay signaling (clear channel).
Syntax Description
No subcommands.
Default Values
By default, the scrambler is disabled.
Command Modes
(config-dds 1/1)# 56K/64K (DDS) Interface Configuration Mode required
Functional Notes
When operating at 64 kbps (clear channel operation), there is a possibility the DTE data sequences may
mimic network loop maintenance functions and erroneously cause other network elements to activate
loopbacks. Use the data-coding scrambled command to prevent such occurrences. Do not use this
command if using Frame Relay or if using PPP to another device other than an Secure Router OS product
also running scrambled.
Usage Examples
The following example enables the DDS OS scrambler:
(config)#interface dds 1/1
(config-dds 1/1)#data-coding scrambled