Sync serial port
131
OnSite 2800 Series User Manual
D • Port pin-outs
X.21 serial port
Note
Pins not labeled are not used.
Table 18. X.21 Female DB-15 connector
X.21 Interface Pin-Out
Pin
Signal
1
Frame Ground
2
TD-a
3
CNTRL-a
4
RD-a
5
IND-a
6
SET-a
8
Signal Ground
9
TD-b
10
CNTRL-b
11
RD-b
12
IND-b
13
SET-b
