Voice At Command Set - ZyXEL Communications COMET 336 User Manual

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Table Of Contents

Table of Contents

When in Voice Receive Mode, the modem sends the proper shielded <DLE> code when

dial tone or busy tone is detected. The modem stays in Voice Receive Mode, however,

until the DTE issues a key abort to force Online Voice Command Mode. The DTE must

issue the H command if it wishes to hang up.

7.2.9 Mode Switching

Voice to Fax

If the modem is in Online Voice Command Mode (i.e., it has gone off-hook with

#CLS=8 in effect), the DTE can attempt a fax handshake by setting #CLS=1, followed

by the A or D command corresponding to fax receive or send. This has the effect of

beginning a fax Class 1 handshake (see #CLS command).

Unsuccessful Fax Connection Attempt to Voice A fax handshake which does not

succeed, attempted as the result of the DTE modifying the #CLS setting from voice (8)

to fax (1), does not result in the modem hanging up, allowing the DTE the flexibility of

commanding a switch back to Voice Mode with #CLS=8.

Voice to Data

If the modem is in the Online Voice Command Mode, the DTE can attempt a data

handshake by setting #CLS=0 followed by the A or D command. This has the effect of

beginning a Data Mode handshake according to the current Data Mode S-register and

command settings.

Unsuccessful Data Connection Attempt to Voice

A data handshake which does not succeed, attempted as the result of the DTE modifying

the #CLS setting from voice (8) to data (0), does not result in the modem hanging up,

allowing the DTE the flexibility of commanding a switch back to

Voice Mode with #CLS=8.

7.2.10 Caller ID

The modem supports Caller ID by passing the information received in Bell 202 FSK

modulation to the DTE after the first RING detect. The modem supports both formatted

and unformatted reporting of Caller ID information received in ICLID (Incoming Call

Line ID) format as supported in certain areas of the U.S. and Canada. The DTE enables

this feature via the #CID command.