Toshiba V.90 - Manual (Page 24)

5
Using the Internal
Modem
This chapter describes connection procedures and basic
operations.
Connection procedures
This section describes how to connect the internal modem to, and
disconnect it from, a telephone jack.
CAUTION: The modem is designed for use with a standard
analog telephone line. Do not connect the modem to a digital
telephone line. A digital line will damage the modem.
Analog or digital?
❖ If you are not sure which type of line a particular line jack
offers, assume that it is digital and do not connect the internal
modem to it.
❖ If the wall jack is known to be connected to a PBX (Private
Branch Exchange) system, then the line is digital. Do not
connect the modem to it.