Specifications
13
Connector type at end of X.21
cable
X.21 DTE cable pinouts
(60-pin connector) to
DB-15 male
DB-15 subminiature,
female for DCE, male for DTE
Signal
Pin # on
Pin # on
Direction (for
Name
60-pin
DB-15
serial port)
Frame GND
46
1
Circuit GND
15
8
RTS
9,10
3,10
OUT
CTS
1,2
5,12
IN
DSR
IN
DCD (not used; tristate when in DTE mode)
DTR
OUT
LL (not used)
OUT
SD+
11
2
OUT
SD-
12
9
OUT
RD+
28
4
IN
RD-
27
11
IN
SCTE+
OUT
SCTE-
OUT
SCR+
26
6
IN
SCR-
25
13
IN
SCT+
IN
SCT-
IN
Shorting
GR 1
47,48,49
Shorting
GR 2
51, 52
(continued)
Table 4
PathBuilder S330 System Specifications
