Symbol PTC-870IM User Manual page 58

Figure 8. IBM PC/XT-to-PTC cable, P/N 12705-1X4
IBM PC/XT
RXD 3
TXD 2
DSR 6
DTR 20
RTS 4
GND 7
N.C.
N.C.
CTS 5
N.C.
PTC-870IM
2 TXD
3 RXD
4 RTS
5 CTS
6 DSR
7 DIGND
8 CD
9 DS0
10 DTR
11 RI
56