Appendix A Product Specifications and Reference Information A-9
A.6.3 Modem Recommendations
A.6.3.1 Cable
For a modem-to-host (system) connection, use an RS-423/RS-232 straight-through
cable with DB-25 male connectors at both ends.
A.6.3.2 Modem Switch Settings (AT Commands)
Note – These settings are guidelines only. These guidelines might change
depending on site requirements and the chosen modem.
■ Enable transmit flow control (AT&H1) [suggested setting]
Required for sending binary/8-bit data.
■ Set link rate to fixed
Will not track modem data rate, AT&Bn; n = menu choice in modem manual
■ Set display result codes (ATQ0)
■ Set verbal result codes (ATV1)
■ Set result code subset (ATXn; n = option choice)
■ Save settings in NVRAM (AT&W)
For additional information about modem switch settings, see the documentation that
came with the modem.
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