IBM H80 Series manual IBM 7852-400 DIP Switch Settings, Xon/Xoff Modems

2.	Copy	the/usr/share/modems/modem_f.cfg			file	to a	new	file with	a	different
name (for example,modem fx.cfg					).
3.	In	the	newmodem filefx.cfg (	),	change theSendline"ATEðT\r" toSend
"ATcccEðT\r" where ccc				is	the added	command	as	specified	in	your modem
manual, as			follows.

Change the third line of each of the following stanzas:

Ÿcondout

Ÿcondin

Ÿripo

4.Save the changes.

IBM 7852-400 DIP Switch Settings

If	you are	using	a	7852-400	modem			to enable service processor communications, for
proper operation, the				dual	inline			package	(DIP) switches must be set according t
the	following	table:
Switch	Position		Function
1	Up			Force DTR
2	Up			Flow	Control		&E4
3	Down			Result	Codes		Enabled
4	Down			Modem	Emulation			Disabled
5	Up			Auto Answer			Enabled
6	Up			Maximum Throughput Enabled
7	Up			RTS Normal		Functions
8	Down			Enable	Command		Mode
9	Down			Remote	Digital			Loopback	Test Enabled
10	Up			Dial-Up Line			Enabled
11	*Up			AT Responses Enabled (Extended Responses Disabled)
12	*Down			Asynchronous Operation
13	UP			28.8KB	Line	Speed
14	Up
15	Up			CD and	DSR	Normal Functions
16	Up			2-Wire	Leased			Line Enabled

*Only switches 11 and 12 are changed from the factory default settings.

Xon/Xoff Modems

Some early modems assume software flow control (Xon/Xoff) between the computer

and the modem. Modems with this design send extra characters during and after t transmitted data. The Service Processor cannot accept these extra characters. If your configuration includes such a modem, your functional results may be unpredictable.

Appendix D. Modem Configurations181