NDA-24296 CHAPTER 2
Pag e 79
Revision 1.0
PH-IO24
Input/Output Controller
4. Lamp Indications

The table below shows lamp indications on this circuit card.

5. Switch Settings

The following is a brief description of the switches on this circuit card. When a switch has a standard

setting, it is indicated with × in the table below.

LAMP NAME COLOR DESCRIPTION
OPE/MB Green This circuit card is operating normally.
Red This circuit card is placed in the Make-busy state.
IOC ALM Red Clock down WDT alarm occurs to the microprocessor.
PORT0 - PORT3 RS-232C signal status indication. n = port number (0-3)
SDn Green SD: Send Data
RDn Green RD: Receive Data
ERn Gre en ER: Equipment Ready
DRn Green DR: Data Ready
CDn Gre en CD: Carrie r Detect
SWITCH
NAME SWITCH
NO. SETTING STANDARD
SETTING DESCRIPTION
MB Up The cir c uit card is p laced into Make-bus y status .
Down ×Cancellation of Make-busy.
MBR Up The cir cuit card is placed into Make-busy reques t stat us .
Down ×Cancellation of Make-busy Request.
SW50
1ON This circuit card is used as the extended I/O circuit card #1.
OFF This circuit card is used as the extended I/O circuit card #0.
2ON Not us e d ( F or B usin e ss Syst em On ly ).
OFF ×
2ON Free Wheeling with ACK signal (For Hotel System Only).
OFF ×Fre e Wheeling.
3ON Not used.
OFF ×
4ON Not used.
OFF ×