Siemens Brodersen MC55 AT - Manual (Page 86)

MC55_ATC_V04.00 Page 86 of 475 3/17/06
Confidential / Released
4.2 AT&C Set Data Carrier Detect (DCD) Line mode
The
AT&C
command determines how the state of the DCD line (circuit 109) reflects the MC55's internal activity.
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>
.
• 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
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last
V.250 , SIEMENS ! % ! % % % ! ! !
<value>
(num)(&W)(&V)