User Manual

VoiceXtender Modem Installer’s Guide
System Planning
Rev. A - 8/97 2-9
❚ Burst Synchronization Timing: The master and slave are both configured
for internal burst synchronization.
(SW1-8 ON)
❚ Phone/Line: The switch must indicate which AirLink modem is connected
to the phone and which modem is connected to the line. In this example,
Unit A would be set to Phone and Unit B would be set to Line.
(SW2-1)
❚ Master/Slave: One AirLink modem must be specified as a master and one as
a slave.
(SW2-2)
❚ Sleep/Normal: Set both modems to Normal.
(SW2-3 OFF)
❚ Pseudo-Random Noise Sequence: Specify the same pseudo-random noise
(PN) sequence on both AirLinks. PN sequence numbers range from 1 to 8.
(SW2-6, 2-7, 2-8)
Example 2: Point-to-Point Intercom Application
In this application, two telephones are connected in an intercom configuration.
In this configuration, when either phone is taken off-hook, the other telephone
will ring. The two telephones can only communicate with each other, and are
not connected to any networks. As shown in Figure 2-5, VoiceXtender modems
are used to provide a point-to-point radio voice intercom link between the two
telephones.
Figure 2-5
Point-to-Point Intercom Application
You only need to configure the parameters on each modem. The following list
describes the parameters for this particular application.