Compaq 281862-002 User Manual page 37

No auto-answer support — Must manually enter modem commands in
the terminal window to take advantage of call back.
IMPORTANT: Make sure your IRC firmware revision revision is 1.41 or
greater if you wish to use HyperTerminal to connect to IRC. In certain
circumstances, HyperTerminal may not accurately transmit characters until
is has received characters from the remote system. Consequently, the Enter,
Enter, Enter sequence may not be correctly sent by HyperTerminal, even
though it was typed correctly by the administrator. If IRC receives any
characters other than the three carriage return sequence, it rejects the call
and does not display the login prompt. IRC Firmware revisions 1.41 or
greater automatically detect this condition to work-around the HyperTerminal
anomaly. To update your IRC firmware, obtain the latest ROMPaq ROM
update for your server.
Compaq Integrated Remote Console User Guide
3-9