CC-2401K2 Page 20 of 66 2007, Copeland Communications, Inc. CC-2401K2 Datasheet Rev 1.5 using the “+++” or “ninth-bit” is not recommen" />
參數(shù)資料
型號(hào)： CC-2401K2A-CS
廠商： Copeland Communications Inc
文件頁(yè)數(shù)： 13/66頁(yè)
文件大?。?/td> 0K
描述： MODEM 2400BAUD SECURE 3.3V
標(biāo)準(zhǔn)包裝： 30
數(shù)據(jù)格式： V.21，V.22，V.23，Bell 103
波特率： 2.4k
電源電壓： 3 V ~ 3.6 V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 模塊
包裝： 散裝
配用： 539-1002-ND - KIT EVALUATION WORLD MODEM II
其它名稱(chēng)： 539-1010
CC-2401K2A-CS-ND
Data Sheet
CC-2401K2
Page 20 of 66
2007, Copeland Communications, Inc.
CC-2401K2 Datasheet Rev 1.5
using the “+++” or “ninth-bit” is not recommended because characters could be sent to and misinterpreted by
the remote modem. Only the “escape pin” <SC> is recommended for use in the “!2” mode. The “!1” mode
has a special escape provision described below.
The AT commands for Alarm Industry applications are
described in the following table.
Command
Function
!1
Dial and switch to DTMF security mode
!2
Dial and switch to “SIA Format”
X1
SIA half-duplex mode search
X2
SIA half-duplex return online as transmitter
X3
SIA half-duplex return online as receiver
!1
Dial number and follow the DTMF security protocol. The format for this command is as follows:
ATDT<phone number>!1<message 1><CR>
K
!<message 2><CR>
K
!<message 3><CR>
K
!<message n><CR>
The modem dials the phone number and returns “r” (ring), “b” (busy), and “c” (connect) as appropriate. “c”
returns only after the modem detects the Handshake Tone. After a 250 ms delay, the modem sends the
DTMF tones containing the first message data and listens for a Kissoff Tone. If a Kissoff Tone shorter than or
equal to the value stored in S36(KTL)(default = 1 second) is detected, the CC-2401 echoes a “K”. A “k” is sent
if the length of the Kissoff Tone is longer than the S36(KTL) value. The controller can then send the next
message. All messages must be preceded by a “!” and followed by a <CR> and received by the CC-2401
within 250 ms after the “K” is echoed. Setting S0C[0](MCH) = 1 causes a “.” to be echoed when the DTMF
tone is turned on and a “/” character to be echoed when the DTMF tone is turned off. This helps the host
monitor the status of the message being sent. The previous message can be resent if the host responds with
a “-“ after the CC-2401 echoes a “K”. Any character other than a “!” or a “~” sent to the modem immediately
after the “K” causes the modem to escape to the command mode and remain off hook. Any character except
“!” and “~” sent during the transmission of a message causes the message to be aborted and the modem to
return to command mode.
If the Kissoff Tone is not received within 1.25 seconds, the modem echoes a “^”. A “~” from the host causes
the last message to be resent. Any character other than a “!” or a “~” sent to the modem immediately after the
“^” causes the modem to escape to command mode and remain off hook.
!2
Dial the number and follow the “SIA Format” protocol for Alarm System Communications.
The modem dials the phone number and echoes “r” (ring), “b” (busy), and “c” (connect) as appropriate. “c”
echoes only after the CC-2401 detects the Handshake Tone and the speed synchronization signal is sent.
The signaling is at 300 bps, half-duplex FSK. The host can send the first SIA block after the “c” is received.
Once the block is transmitted, the modem can monitor for the acknowledge tone by completing the following
sequence:
1.
Place the CC-2501 in command mode by pulsing the ESCAPE pin. The “+++” and “ninth-bit” escape
modes operate in the “!2” mode but are not recommended because they can send unwanted characters to
the remote modem.
2.
Issue the “ATX1” command to turn the modem transmitter off and begin monitoring for the
acknowledgement tones.
3.
Monitor for a positive (negative) acknowledgement “P” (“N”) after the tone has been detected for at least
400 ms.
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