EV6240 Datasheet, PDF (33/47 Pages) CML Microcircuits – Opto-Isolated serial interface capability

Evaluation Kit for CMX624/CMX644A
EV6240
1.6.5.6 Modem One Originating a V23 Call to an External Simulator/Modem
Modem One configured to dial out via the 2-wire line using a blind dialling method (blind dial wait time
of 5 seconds) with DTMF tone durations of 200ms.
Example assumes the evaluation board is powered up with CMX624 target devices inserted and with
the line select switches set to 2-wire and the crystal select switches set to 3.5795MHz.
1. Set Wait Time for Blind Dialling S-Register (S6) to 5 seconds.
Command : ATS6=5<CR>
2. Set DTMF Tone Duration S-Register (S11) to 200ms.
Command : ATS11=20<CR>
3. DTMF Dial.
Command : ATD0176432198<CR>
Modem One will begin the EV6240 Calling Modem Handshaking Sequence when the DTMF tones
have been transmitted.
The OK result code returned to the PC after dialling indicates the handshaking sequence has begun.
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© 1999 Consumer Microcircuits Limited
UM6240/3