CXR AJ 2885P Manual de usuario Pagina 43

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User's Manual V34bis Fax-modem - AJ 2885 P
AJ 2885 P - Page 43
9. Appendix A - V24 signals
9.1. V24 – V28 interface
Pin number Name CCITT number
1 101 Earth protection
2 TXD 103 Data transmission
3 RXD 104 Data reception
4 RTS 105 Request to send
5 CTS 106 Clear to send
6 DSR 107 Data set ready
7 GND 102 Signaling earth
8 CD 109 Carrier detect
10 (*) Si 117 Dial backup indicator
12 SPD - High speed indicator
15 SCT 114 Time basis for signal elements at transmission.
Source: ETCD
17 SCR 115 Time basis for signal elements at reception
18 TB3 141 Test command. Local loop 3.
20 DTR 108/2 Data terminal ready
21 DB2 140 Test command: remote control of loop 2
22 RI 125 Ring indicator
24 SX 113 Time basis for signal elements transmission. Source:
ETTD.
25 TEST 142 Test indicator.
(*) except FT model
CABLE DB9 - DB25
PC - MODEM
TXD 3 2 TXD
RXD 2 3 RXD
RTS 7 4 RTS
CTS 8 5 CTS
DSR 6 6 DSR
GND 5 7 GND
DCD 1 8 DCD
DTR 4 20 DTR
RI 9 22 RI
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