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Psm9to, Handoverstatus, Tcpirt – Siemens Brodersen MC55 AT User Manual

Page 55: Tcpmr, Tcpot

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MC55_ATC_V04.00

Page 55 of 475

3/17/06

Confidential / Released

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

=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.

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.

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

and

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

.

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

will be assumed as default for the

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.

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

will be assumed as default for the

ParmTag>

"tcpOT" when a new service profile is created with

AT^SISS

. How-

(str)(+CSCS)

(str)(+CSCS)

(str)(+CSCS)

(str)(+CSCS)

(str)(+CSCS)