ZyXEL U-1496S Plus User Guide - Page 81

Parallel Receive With The Fax Machine

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Tn Coding scheme; n=0 or 1. Rn Recording width; n=0, 1, or 2. Ln Recording length; n=0, 1, or 2. Cn Scan line time; n=0 to 7. P Remote fax number. After each fax disconnection, the following result code is sent back to the DTE (computer): DISCONNECTnP This result code informs DTE of the disconnecting status. DISCONNECT0 Disconnect with remote confirmation. DISCONNECT1 Disconnect without remote confirmation. P Remote fax number. The basic AT commands 'ATV0' and 'ATQ1' do not affect the above CONNECT and DISCONNECT status report result codes. The modem will always return the same status form as above. FLOW CONTROL In extended FAX AT command mode, the modem always uses hardware (CTS/RTS) flow control. The following flow control signaling is used during sending a fax: CTS is used by the modem to flow control the DTE. When the modem turns CTS off, the buffer inside the modem is full and cannot accept any more data. The computer should send data only when CTS is ON. RTS is used by the computer to signal the modem that the fax message is finished. As soon as RTS off is detected, the modem starts the post message handshaking to make sure that the remote facsimile has received the fax message successfully, then hangs up the phone. After hanging up, the modem sends a status report result code to the DTE. If you want to send a multi-page fax, you need only add the RTC signal between the fax message of two pages. The modem detects the RTC signal automatically, handshakes the multipage procedure with the remote facsimile and sends the next page message. The following flow control signaling is used during receiving a fax: CTS is not used when receiving fax. RTS is used to inform the modem that the computer cannot accept data at this moment. The modem will not pass any received data to DTE if RTS is turned off. When finished receiving the fax message, the modem will turn off CD then send a status report result code to the DTE. PARALLEL RECEIVE WITH THE FAX MACHINE You can connect the modem and a fax machine on the same line and have the modem answer data calls and the fax machine answer fax calls, respectively. The modem will distinguish a data call from a fax call and make the switch. Following is the setup procedure.

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Tn
Coding scheme; n=0 or 1.
Rn
Recording width; n=0, 1, or 2.
Ln
Recording length; n=0, 1, or 2.
Cn
Scan line time; n=0 to 7.
P<string>
Remote fax number.
After each fax disconnection, the following result code is sent back to the DTE (computer):
DISCONNECTnP <string>
This result code informs DTE of the disconnecting status.
DISCONNECT0
Disconnect with remote confirmation.
DISCONNECT1
Disconnect without remote confirmation.
P <string>
Remote fax number.
The basic AT commands 'ATV0' and 'ATQ1' do not affect the above CONNECT and
DISCONNECT status report result codes. The modem will always return the same status form as
above.
FLOW CONTROL
In extended FAX AT command mode, the modem always uses hardware (CTS/RTS) flow
control. The following flow control signaling is used during sending a fax:
CTS is used by the modem to flow control the DTE. When the modem turns CTS off, the buffer
inside the modem is full and cannot accept any more data. The computer should send data only
when CTS is ON.
RTS is used by the computer to signal the modem that the fax message is finished. As soon as
RTS off is detected, the modem starts the post message handshaking to make sure that the
remote facsimile has received the fax message successfully, then hangs up the phone. After
hanging up, the modem sends a status report result code to the DTE.
If you want to send a multi-page fax, you need only add the RTC signal between the fax
message of two pages. The modem detects the RTC signal automatically, handshakes the multi-
page procedure with the remote facsimile and sends the next page message.
The following flow control signaling is used during receiving a fax:
CTS is not used when receiving fax.
RTS is used to inform the modem that the computer cannot accept data at this moment. The
modem will not pass any received data to DTE if RTS is turned off.
When finished receiving the fax message, the modem will turn off CD then send a status report
result code to the DTE.
PARALLEL RECEIVE WITH THE FAX MACHINE
You can connect the modem and a fax machine on the same line and have the modem answer
data calls and the fax machine answer fax calls, respectively. The modem will distinguish a data
call from a fax call and make the switch. Following is the setup procedure.