Siemens AC75 manual TcpWithUrcstr+CSCS

AC75 AT Command Set

2.14 AT^SCFG

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<tcpOt>(str)(+CSCS)

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.

<tcpSack>(str)(+CSCS)

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.
<tcpTtcp>(str)(+CSCS)
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.

<tcpWithUrc>(str)(+CSCS)

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.

AC75_ATC_V01.002	Page 70 of 569	10/30/06
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