BGS2T AT Command Set
4.2 AT&C
BGS2T_ATC_V01.301 Page 95 of 554 1/31/12
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4.2 AT&C Set Data Carrier Detect (DCD) Line Mode
The AT&C command controls the behavior of the ME's DCD line.
Syntax
Parameter Description
[0] DCD line shall always be on.
1
(&F)
DCD line shall be on only when data carrier signal is present.
2 DCD line shall be on when one or more Internet services defined on the related
serial channel are in state "Connecting" or "Up" as described below. For details
on the various service states refer to AT^SISI, parameter <srvState> or
AT^SISO, parameter <srvState>.
• Transparent TCP or Transparent UDP client, SOCKET, HTTP, SMTP,
POP3: DCD shall be on when <srvState>="Connnecting" or "Up"
• FTP: DCD shall be on when data channel is connected, i.e.
<srvState>="Up"
Exec Command
AT&C[<value>]
Response(s)
OK
PIN ASC0 MUX1 MUX2 MUX3 Last Reference(s)
- + + + + - - V.250
<value>
(num)(&W)(&V)
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