User Manual

VoiceXtender Modem Installer’s Guide
System Planning
2-10 Rev. A - 8/97
❚ RF Channel: For the VoiceXtender, any of the ten available channels can
be used. Choose a channel that is not being interfered with. The channel
selected for master and slave units must be the same.
(SW1-1, 1-2, 1-3, 1-4)
❚ Transmit Output Power: The minimum required power is typically
recommended for most applications. Both units in a link need not be set to
the same power level.
(SW1-5, 1-6, 1-7)
❚ Burst Synchronization Timing: The master and slave are both configured
for internal burst synchronization.
(SW1-8 ON)
❚ Phone/Line: The switch must be set to the Phone position on both AirLink
modems.
(SW2-1 OFF)
❚ Master/Slave: One 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 modems. PN sequence numbers range from 1 to 8.
(SW2-6, 2-7, 2-8)
Example 3: Hub Application
In this application, several telephones are connected to the switch or centrex in
the same building. As shown in Figure 2-6, VoiceXtender modems are used in a
hub configuration. Because the telephones and switch are located in the same
building, the low-gain omnidirectional antenna provided with the unit can be
used. No path analysis is required with an omnidirectional antenna and short
distances.