Siemens MC55 AT manual HandOverStatusstr+CSCS

<psm9to>(str)(+CSCS)

Power saving mode 9 timeout

This parameter can be used to query or configure the wake up time for power saving mode 9 (see AT+CFUN with parameter <fun>=9).

Parameter is global for the ME, volatile and will not be reset by AT&F.

5...20(P)...36000	The granularity of the timeout value is 100ms (i.e. a value of 10 equal 1 sec-
	ond). The minimum timeout value that can be applied is 5, but accuracy is only
	guaranteed for timeout values greater than 20.

<HandOverStatus>(str)(+CSCS)

Call Handover Status

This parameter offers a workaround to prevent problems during call handover into the 1900 MHz (or 1800 MHz) band, caused by non-conforming configurations of the 1900 MHz (or 1800 MHz) GSM network.

"0"(P)	Disable workaround.
"1"	Enable workaround. This value should be selected when handover into a 1900
	MHz (or 1800 MHz) GSM network fails. If required for permanent use the value
	needs to be set each time the ME is restarted.

<tcpIrt>(str)(+CSCS)

Initial Retransmission Timeout (IRT)

1...3(&F)(D)...60	This parameter determines the time (in seconds) the TCP/IP stack will wait
	before starting the first retransmission of packets during the initial connection

establishment phase.

The TCP protocol ensures the retransmission of packets several times at increasing intervals until some upper limit is reached.

This mechanism prevents packet loss and serious congestion problems. In addition, the parameters <tcpMr> and <tcpOt> can be set to further optimize this mechanism for special conditions depending on the mobile network.

Parameter is global for the ME and non-volatile. Use of default value is recom- mended. If changed the new value takes effect the next time you start an Inter- net service with AT^SISO.

<tcpMr>(str)(+CSCS)

Maximum Number of Retransmissions (MR)

1...10(&F)(D)...30	This parameter determines the maximum number of times to retransmit TCP
	packets.

The value set with <tcpMr> will be assumed as default for the <srv- ParmTag> "tcpMR" when a new service profile is created with AT^SISS. In each service profile, you can set another "tcpMR" 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 global for the ME and non-volatile. Use of default value is recom- mended.

<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-
MC55_ATC_V04.00		Page 55 of 475	3/17/06
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