Siemens AC75 - Manual (Page 70)

AC75 AT Command Set
2.14 AT^SCFG
s
AC75_ATC_V01.002 Page 70 of 569 10/30/06
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Overall TCP Timer for outstanding connections (tcpOT)
1...6000
(&F)(D) This parameter specifies the number of seconds to wait before closing a con-
nection if TCP/IP packets are not acknowledged.
Setting the maximum value is practically equivalent to deactivating the tcpOT
mechanism because the maximum time would never be reached by the TCP/
IP stack.
The value set with
<tcpOt>
will be assumed as default for the
<srv-
ParmTag>
"tcpOT" when a new service profile is created with
AT^SISS
. How-
ever, in each service profile, you can set another "tcpOT" value which has
precedence over the global value set with
AT^SCFG
. Existing service profiles
are not affected when you change the global value via
AT^SCFG
.
Parameter is non-volatile. Use of default value is recommended.
Selective Acknowledge (SAck)
This parameter concerns a set of TCP extensions to improve performance and to provide reliable operation. It
defines new TCP options for scaled windows and timestamps, which are designed to provide compatible inter-
working with TCPs that do not implement the extensions.
The set of TCP extensions to improve performance is described in RFC 1323. The value set with
<tcpSack>
enables or disables the set of TCP extensions.
Parameter is global for the ME. Use of powerup value is recommended.
“0“
Disable set of TCP extensions.
“1“ (P) Enable set of TCP extensions.
Transaction/TCP (T/TCP)
This parameter concerns T/TCP, an extension of TCP to provide a transaction-oriented service.
T/TCP is described in RFC 1644. The value set with
<tcpTtcp>
enables or disables T/TCP.
Parameter is global for the ME. Use of powerup value is recommended.
“0“
(P) Disable T/TCP extension.
“1“ Enable T/TCP extension.
URC mode or polling mode for Internet service commands
This parameter enables or disables the presentation of the following URCs related to Internet service com-
mands: "
^SISR
" URC, "
^SISW
" URC and "
^SIS
" URC for parameter
<urcCause>
=0 (Internet service events).
"
^SIS
" URCs with
<urcCause>
=1 or 2 used to indicate incoming Socket connections are always enabled.
Parameter is global for the ME and non-volatile.
“on“
(&F)(D) Enable URCs related to Internet service commands.
Throughout the Chapter "Internet Service AT Commands" the mode is also
referred to as URC mode.
“off“ Disable URCs related to Internet service commands.
This requires the host application to employ polling techniques when using the
Internet service AT commands: The host application is responsible to retrieve
all status information needed to control an Internet session. The method is
referred to as polling mode.
<tcpOt>
(str)(+CSCS)
<tcpSack>
(str)(+CSCS)
<tcpTtcp>
(str)(+CSCS)
<tcpWithUrc>
(str)(+CSCS)