
Configuring ATM Services
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Specifying DS3 Line Build Out
On modules that use a DS3 interface, you can specify how the router conditions
signals to migrate attenuation. Specify a short line (the default) for a line less than
225 ft long. Specify a long line for a line length of 225 ft or more.
Turning On and Off DS3 Scrambling
Some ATM network equipment can exhibit sensitivity to certain bit patterns (for
example, 101010... or 000000...). This sensitivity can cause problems in the ATM
network. Turning on the DS3 Scrambling feature (the default setting) randomizes
the bit pattern in the cell payload sufficiently to guarantee cell synchronization.
Though some equipment may have the ability to operate with scrambling
disabled, we recommend that you scramble the cell payload.
Site Manager: DS3 Line Build Out: page A-12
Note: ATM devices with different scrambling settings cannot communicate.
For example, if you configure a router to enable scrambling, and configure a
hub to disable scrambling, the router and hub cannot communicate.
Site Manager: DS3 Scrambling: page A-13
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