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Chapter 5. Applications
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 5-7.
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 DDS cir-
cuit, the DLCI value must be non-zero and it must be the same on
both ends of the circuit.
5-12
Figure 5-6. Daisy-Chaining Application
Express 5210 User Manual
61200208L1-1
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