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Chapter 15: 56/64-kbps Switched and Digital Data Services (DDS) Interface
August 1997 Page 15-1
2524UM
Chapter 15: 56/64-kbps Switched and
Digital Data Services (DDS) Interface
Configuration Steps
Introduction
This chapter describes how to configure 2- and 4-wire 56/64 kbps ser-
vice modules. These tasks are described:
z
Set the Clock Source
z
Set the Network Line Speed
z
Enable Scrambled Data Coding
z
Change Between DDS and Switched Dial-Up Modes
z
Enable Acceptance of a Remote Loopback Request
z
Select a Service Provider
Set the Clock
Source
In most applications, the CSU/DSU should be configured with the
service-module 56k clock source line
command. Fo
back-to-back configurations, use the
internal
keyword to config-
ure one CSU/DSU and use the
line
keyword to configure the othe
CSU/DSU.
Configure the clock source for a 4-wire 56/64-kbps CSU/DSU mod-
ule:
service-module 56k clock source {line |
internal}
Do not use any form of this command to revert to the default clock
source, which is the line clock.