Perle Systems 5500152-23 Option description, Configuration, 485hdx, 485fdx, option, For example

Option description	Configuration	232	422	485hdx	485fdx
	option
Baud rate multiplier	-x	optional	optional	optional	optional
		(1,2,4,8,	(1,2,4,8,	(1,2,4,8,	(1,2,4,8,
		16,32)	16,32)	16,32)	16,32)
Slew rate limiting	-s	optional	optional	optional	optional
		fast/slow	fast/slow	fast/slow	fast/slow
Line termination	-t	N/A	optional	optional	optional
			(term/	(term/	(term/
			unterm)	unterm)	unterm)
EIA-485 HDX local	-e	N/A	N/A	optional	N/A
echo				echoon/
				echoff
EIA-485 TX Driver	-a	N/A	N/A	optional	optional
Control				(auto/rts)	(auto/rts)
Auto EIA-485 bit delay	-b	N/A	N/A	optional	optional
				( 0 -15)	( 0 -15)

(-f)Specifies the name or range of names which the action should be taken on.

For example:

/dev/ttyz1 -specifies port 1 /dev/ttyz1,/dev/ttyz64 - specifies ports 1 through 64

(-l)Lists the protocol configuration for each serial port configured on the UltraPort SI. /dev/ttyz1 232 slow term 1

/dev/ttyz1 485fdx fast term auto 5 1

The first example shows a device named ttyz1 configured for protocol mode EIA-232, slew rate limiting is set to slow, termination is on, and the baud rate multiplier is 1

The second example shows device named ttyz1 configured for protocol mode EIA-485fdx, slew rate limiting is set to fast, termination is on, EIA-485 HDX TX Driver Control is set to auto with bit delay of 5 bits and the baud rate multiplier is 1

(- m ) Interface mode: The valid software switchable protocol types are EIA-232, EIA-422, EIA-485 Full Duplex and EIA-485 Half Duplex. Each port on the UltraPort SI are independent of each other and therefore you may select different protocols per serial port.

(-x) Baud Rate Multiplier: The baud rate multiplier allows the user to multiply the configured baud rate by 1, 2, 4, 8,16 or 32, hence achieving greater speeds on the UltraPort SI serial interfaces. This is applicable for each protocol type selected. Baud rates for EIA-232 are up to 921.6 Kbps per serial port. Baud rates for EIA-422/EIA-485 are up to 3.686 Mbps per serial port.

UltraPort Serial Adaptors User Guide	Chapter 2 Installing drivers and host cards
Installing under SCO OpenServer and OpenServer6	Page 58