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PLAR Mode Application
PLAR (private line automatic ringdown) mode connects up to two
remote telephone sets to one or two local telephone sets without a
PBX. PLAR mode runs over a point-to-point DDS network or over
a frame relay network. This mode requires the use of FXS modules
on both ends for connection to the telephone sets. In PLAR mode,
taking a phone off-hook rings the opposite end of the circuit. See
Figure 4-9.
For PLAR mode, the DLCI for each voice port must be pro-
grammed. In the case of a frame relay circuit, this is the local DLCI
that the voice data is to be carried on. For a point-to-point circuit,
the DLCI value must be non-zero and it must be the same on both
ends of the circuit.
61202175L1-1
Figure 4-8. Voice Over Frame Relay Application
Express 5200 User Manual
Chapter 4. Applications
4-15
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