Quatech QSC(LP)-100 user manual RS-232 Port Signal

The QSC(LP)-100 is a DTE device which connects to peripheral equipment through a single female D-44 connector, or using the adapter cable, four male D-9 connectors. The standard serial port connections are listed in Figure 18.

RS-232	Port 1		Port 2		Port 3		Port 4
Signal	D-44	D-9	D-44	D-9	D-44	D-9	D-44	D-9
TxD	13	3	10	3	6	3	2	3
RxD	42	2	39	2	35	2	31	2
RTS	14	7	11	7	7	7	3	7
CTS	43	8	40	8	36	8	32	8
DTR	28	4	24	4	21	4	17	4
DSR	27	6	23	6	20	6	16	6
DCD	44	1	41	1	37	1	33	1
RI	29	9	25	9	22	9	18	9
GND	19	5	8	5	26	5	30	5

Figure 18 --- QSC(LP)-100 connector pinouts

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