User Manual

AirLink Pro T1/E1 Rack Mount Installer’s Guide
Configuration
Rev. B - 1/97
3-16
where operand is either Normal or Test. If you do not specify a value, the
system assumes the default value: Normal.
For example, to set the burst mode for the local AirLink Pro T1 to Normal, type
the following command at the AirLink Pro T1/E1 Rack Mount prompt:
AIRLINK PRO T1/E1> set burst mode normal
To set the burst mode of the remote AirLink Pro T1, use the command:
AIRLINK PRO T1/E1> remote set burst mode operand
WARNING If the burst mode of the remote unit is changed from Normal to Test, it cannot be
restored to Normal from the local unit.
PN Code
The AirLink Pro T1/E1 Rack Mount has a set of pseudo-random noise (PN)
codes. Each code number corresponds to a subset of long binary code words. These
code words are substituted for each bit in the T1 data stream. This substitution
is the basic principle of the direct-sequence spread spectrum modulation
scheme used in the AirLink Pro T1/E1 Rack Mount.
No PN code is “better” or “worse” than another. Using a different code
separates the AirLink Pro T1/E1 Rack Mount and the desired incoming signal
from undesired signals from other AirLink Pro T1/E1 Rack Mount paths.
The master unit and the slave unit of a AirLink Pro T1/E1 Rack Mount pair must
be set to the same PN code (pseudo-random noise code). The setting is then
stored in the protected system configuration memory of both units in the pair.
To set the PN code for the local unit, type the following command at the
AirLink Pro T1/E1 Rack Mount prompt:
AIRLINK PRO T1/E1> set pn code operand
where operand is a number from 1 to 8. If you do not specify a value, the system
assumes the default value: 1. For example, to set the PN code for the local
AirLink Pro T1 to 4, type the following command at the AirLink Pro T1 prompt:
AIRLINK PRO T1/E1> set pn code 4