User manual

TECHNICAL INFORMATION Appendix-1

Appendix TECHNICAL INFORMATION

Digital Interfaces

To set up a connection between modem and computer/terminal (DTE = Data ter-

minal equipment), an interface cable with the following features is required: ISO

2110 (SUB-D 25) to V.42 with V.28 level

Table 8 Interface Cables to V.42

Audio Jack

Loudspeaker 3.5 mm mono latching jack; impedance 42

DIN

CCITT

DIN

41612

ISO 2110

SUB-D25

Wire function Description

Direction

Mod.-

DTE

E2 102 16c 7 Operating earth Frame GND

D1 103 11c 2 Sende data TxD <<

D2 104 12c 3 Receive data RxD >>

S1 108 16a 20 Transmission line On

DTE ready to operate

DTR <<

M1 107 15c 6 Operational readiness DSR >>

S2 105 13c 4 Switch on transmitter RTS <<

M2 106 14c 5 Ready to send CTS >>

M3 125 19a 22 Incoming call Ring Indicator >>

M5 109 18c 8 Receiver signal level DCD >>

PS2 140 18a 21 Remote test loop ON Remote Loop-

back Request

PS3 141 14a 18 Local test loop ON Local Loopback

Request

PM1 142 - 25 Display test mode <<

T1 113 21a 24 Transmit clock to DCE Transmit Clock

DTE-Source

T2 114 11a 15 Transmit clock from

modem

Transmit Clock

DCE-Source

T4 115 13a 17 Receive clock from

modem

Receive Clock

DCE-Source

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