Configuring HP-UX For Peripherals

Chapter 4 127

Conﬁguring Terminals and Modems

Additionally Conﬁguring HP-UX for a Modem

for the interrupt signal as well as for baud-rate switching.

• Modem speed between modem and terminal should be known;

however, speed can be negotiated in modem-to-modem connections

(using the modems' autobauding speed detection). Initially, features

such as hardware ﬂow control (CTS/RTS) and error correct should be

turned off. Once you have established that the modem communicates

properly, add these features one at a time.

• If modems connect but no data appears, turn off all compression,

reliability, MNP, PEP, LAP, and other advanced features. Set the

modem as simply as possible. Once working, add the advanced

features.

•Donot use CCITT control signals on modem or HP computer. Note

that this does not affect the modem use of CCITT modulation or

compression standards such as V.22, V.32, V.22bis, V.32bis, V34, V.42,

or V.42bis.

• Save modem settings in non-volatile memory on modem so modem

remembers setup after power loss. (Use AT&W on Hayes modems).

• Record modem settings on a worksheet in Appendix D , “Worksheets,”

for future reference.