25-Pin To 15-Pin Straight Through Cable - Internal Clock - Digi TransPort User Manual

X.21 (RS-422)
Description
Transmit Data (A)
Receive Data (A)
Control (A)
Indication (B)
Ground
Clock (B)
Indication (B)
Transmit Data (B)
Receive Data (B)
Clock (A)
Control (B)
1 With respect to Digi units
2 Direction depends on whether the Digi unit is clock sink or clock source.
X.21 25-Pin to 15-Pin straight through cable - internal clock
This is normally the cable to use to connect an X.21 terminal (such as, an ATM) to the Digi. Use
this cable when the Digi is the clock source or configured as internal clock.
Signal
Frame Ground (Case)
TxDA
RxDA
CTLA
INDA
GND
CLKB
INDB
TxDB
Digi TransPort User Guide
RS232 signal
TxDA
RxDA
CTLA
INDA
GND
CLKB
INDB
TxDB
RxDB
CLKA
CTLB
DB 25 - Digi Side
Pin # (DCE)
Shield
2
3
4
5
7
9
13
14
1
Direction DB 25 Pin#
in 2
out 3
in 4
out 5
n/a 7
9
2
in or out
out 13
in 14
out 16
17
2
in or out
in 19
Pin # (DTE)
Shield
2
4
3
5
8
13
12
9
TA2020B & IR2110B
DB 9 Pin#
1
2
3
4
5
n/a
9
6
7
n/a
8
DB 15
Signal
Frame Ground (Case)
TxDA
RxDA
CTLA
INDA
GND
CLKB
INDB
TxDB
650