5 MULTI I/O CARD
3021M100-002
5-5
5.1.3 Signal LEDs
There are 3 LEDs for each port on the Multi I/O. The DCE LED glows red when
the port is configured as a DCE, the RXD LED blinks green when data is received
and the TXD LED blinks green when data is transmitted.
5.1.4 Multi I/O Signal Handling
Signaling through each V.24 port complies fully with ITU-T’s V.24 and EIA-
232D standards for each DB-25 on the Multi I/O cable.
5.1.5 Multi I/O Card Power Consumption
Power consumption is 3 Watts (10.3 BTU/hr).
Table 5-1 Signal Pin-Outs for Multi I/O V.24
V.24
Signal
Circuit Function EIA CCITT
DB-25
Pin No.
Signal
DTE
Direction-
DCE
TXD Transmitted Data BA 103 2 Out In
RXD Received Data BB 104 3 In Out
RTS Request to send CA 105 4 Out In
CTS Clear to Send CB 106 5 In Out
DSR Data Set Ready CC 107 6 In Out
SG Signal Ground AB 102 7 n/a n/a
DCD Data Carrier Detect CF 109 8 In Out
TXC Transmit Timing DB 114 15 In Out
*SRD Secondary Receive Data SBB 119 16 not used not used
RXC Receive Timing DD 115 17 In Out
DTR
Data Terminal Ready (DTE
Ready)
CD 108.2 20 Out In
EXTC Terminal Timing DA 113 24 Out In
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