Filter
Top Products
A-14
A
P
P
E
N
D
I
X
A:
S
P
E
C
I
F
I
C
A
T
I
O
N
S
X.21 DTE and DCE Serial Cable Pinouts
Table A-17 lists pinouts for:
■
X.21 DTE synchronous serial cable (Part Number ERMX21-CAB)
■
X-21 DCE synchronous serial cable (Part Number ERFX21-CAB)
Table A-17
X.21 DTE and DCE Cable Pinouts (DB-15)
15 Pin
1
Signal
DTE DCE
Direction
J2-1
Shield GND
—
J2-2
J2-9
Transmit+
Transmit-
→
→
J2-3
J2-10
Control+
Control-
→
→
J2-4
J2-11
Receive+
Receive-
←
←
J2-5
J2-12
Indication+
Indication-
←
←
J2-6
J2-13
Timing+
Timing-
←
←
J2-8
Shield
Circuit GND
—
—
—
1
Any pin not referenced is not connected.