Indicates whether or not you wish modem calls to rely on the Area property configured for serial port tags.
If set to "1", UseSerialAreaInModemCall forces any calls to a site to use only modems with an area property matching that of the serial port tag.
If UseSerialAreaInModemCall is set to "0", the area configured for serial port tags has no bearing on modem calls (default for backwards compatibility issues).
Default: UseSerialAreaInModemCall = 0