ZPDA (250-3100)                   Modem                Faxback Doc. # 2645

NOTE:
Use of a 2400 baud, Hayes AT Command compatible modem (except for the
PCMCIA modem card) is recommended. For example, the US Robotics
WORLDPORT 2400 V.42 bis modem can be used with this unit. You should
not, however use a modem that takes its power supply from the RS-232C
port of the host unit, even if such a modem is 2400 baud and Hayes AT
Command compatible.

You can connect the unit to a serial modem. You need a serial modem and a
serial cable. Before you can communicate through the modem, you need to
set up the modem communications preferences.

To connect to a serial modem:

1. Turn the power off to the modem and the unit.
2. Uncover the RS-232C port and connect the modem using a RS-232C cable.
3. Turn on the power to the modem.
4. Turn on the power to the unit.
5. Set up the modem and communications preferences.

To set modem and protocol options:

 1. From the Preferences screen, tap Connect.
 2. From the Connect dialog box, tap Modem Options.
 3. Tap the Port pop-up menu and select the port you want to use.
 4. Tap the Baud Rate pop-up menu and select the transmission speed you 
    want to use.  The baud rate is the maximum speed that information can
    be transmitted between the unit and modem or remote system. Set the 
    baud rate to the highest rate both your modem and the remote system can
    handle.
 5. Tap the Parity pop-up menu and select the parity that matches the modem
    or remote system.
    Parity is a method that checks for errors during transmission.
 6. Tap the Word Length pop-up menu and select the stop bits used by the
    modem or remote system.
    The Word-Length (may be called Data Bits by the remote system) specifies
    the number of bits that make up a character.
 7. Tap the Stop Bits pop-up menu and select the stop bits used by the 
    modem or remote system.
    The stop bits indicate the end of a transmitted character.
 8. Tap the Handshake pop-up menu and select the handshake method to use.
    Handshake refers to a method of monitoring the flow of information
    between the unit and the remote system. The handshake method of both 
    the unit and the remote system must match.

    Select Software (XON/XOFF) to allow the unit to monitor the flow of
    information from the remote system. This starts and stops the flow as
    needed.

    Select None if the remote system does not use a handshake method. If 
    you select None, you risk losing portions of incoming information.

    Select Hardware if the remote system uses one of these methods: DTE,
    RTS, CTS, DCD, DSR. Then, select the method used for Stop Remote and
    Stop Local.
 9. Tap OK to go back to the Connect screen.
10. Tap Close to go back to Preferences screen.

(clh-09/27/93)