IBM - 09F1889 - Interface Board 8-Port RS-232C 09F1889 - IBM - 8-Ports RS-232C Electrical Interface Board for PS/2 Model 55 SX HMS $109.07 $88.68
IBM - 16F1896 - Daughter Board 8-Port RS-232C RS-422A 16F1896 - IBM - Artic 8-Ports RS-232C / RS-422A Daughter Board $434.69 $368.38
HP - J2092A - Communication Card 16-Port RS-232C MUX J2092A - HP - 16 Channel RS-232C Direct Connect MUX Communication Card $135.95 $115.21
HP - J2060-69011 - Terminal Server 16-Port RS-232C Telnet J2060-69011 - HP - RS-232C DTC Controller (Standard) 16TN Telnet Terminal Server $429.41 $349.12
HP - J2094A - Communication Card 16-Port RS-232C Modem MUX J2094A - HP - 16 Channel RS-232C Modem Connect MUX Communication Card $75.20 $61.14