HP A1027-66503 - 4 port console MUX panel board - 4 Port Console MUX Panel Bd - Next to Single High I/O Slots Retail
HP 27140-69001 - CIO 6-CHANNEL RS-232C MUX I/O board - CIO 6-Channel RS-232C MUX I/O Board (P/O 27140A) Retail
HP 12040-69005 - 8-channel asynchronous (RS-232C) MUX I/O board - 8-Channel Asynchronous (RS-232C) MUX I/O Board (12040A/B) Retail