PCI MUX Cabling Solutions

Pin Connection Diagrams
This section provides pin connection diagrams for converting A6748A/A6749A serial ports to
AD278A/AD279A serial ports.
Table 9 provides pin diagrams for converting A6748A/A6749A RS-232 RJ45 Serial Port to
AD278A/AD279A RS-232 DB25 Serial Port.
Table 9: Converting A6748A/A6749A RS-232 RJ45 Serial Port to AD278A/AD279A
RS-232 DB25 Serial Port
RJ45 Pin
Plug
Number
(A6748A/
A6749A
Solution)
RJ45
Jack Pin
Number
(A6748A
/A6749A
Solution)
DB25 Pin
Number
(AD278A/
AD279A
Solution)
RS 232
Signal
RS 232 Signal
Description
Pin # 1 RI Ring Indicator Pin # 22
Pin # 2 RTS Request to
Send
Pin # 4
Pin # 3 DTR Data Terminal
Ready
Pin # 20
Pin # 4 RXD Received Data Pin # 3
Pin # 5 GND Chassis
Ground
Pin # 6 TXD Transmitted
Data
Pin # 2
Pin # 7 GND Signal Ground Pin # 7
Pin # 8 DCD Data Carrier
Detect
Pin # 8
Pin # 9 CTS Clear to Send Pin # 5
Pin # 10 DSR Data Set
Ready
Pin # 6