Black Box SW545A, Manual, Page: 30 / 64

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CHAPTER 5: Configuration
The Modem Mode
The Modem Mode allows the port to be connected to an external modem.
A port configured for Modem Mode can also perform all of the functions
normally available in the Any-to-Any Mode. Only Ports 1 and 2 can be
configured for the Modem Mode.
In addition to allowing data transfer, the Modem Mode also provides
several functions specifically related to modem communication. When the
Modem Mode is selected, you can also define a password to restrict remote
access to the Command Mode. When someone calls the PM Switch across a
modem link, the unit will prompt the caller to enter the password. The
PM Switch allows three attempts to enter the password. If the correct
password is not entered in three attempts, or if the caller does not respond to
the password prompt within 30 seconds, the PM Switch will disconnect and
reset the modem.
The Modem Mode also allows redefinition of the Modem-Reset Message
and Hang-Up Message. Although the default reset and hang-up messages are
compatible with most modems, these messages can be redefined when
necessary.
Note that a modem can also be connected to a PM Switch port configured
for the Any-to-Any Mode, providing that the modem does not require an
externally supplied reset message or hang-up message.
When using the Modem Mode, note the following:
• The PM Switch supports DCD input and the input and output of flow-
control signals on Modem Mode ports, as long as the modular adapter
attached to the modem’s serial port is pinned correctly. (The included
adapter is; when you assemble an adapter from the FA024 adapter kit
according to the pinout in t
Appendix A , the DSR signal from the modem
must be high in order to pull up the DTR signal.)
• When a modem is connected to the PM Switch, other connected devices
can use the modem for calling out. To call out from the modem, invoke
the /C command to connect to the port, and access the modem as you
normally would.