Siemens AC75 - Manual (Page 69)

AC75 AT Command Set
2.14 AT^SCFG
s
AC75_ATC_V01.002 Page 69 of 569 10/30/06
Confidential / Released
“10“ GSM 850 MHz + GSM 1800 MHz
“12“ GSM 850 MHz + GSM 1900 MHz
Radio Output Power Reduction
According to 3GPP Rel99, output power reduction for multiple TX slots is a mandatory feature. The amount of
power reduction is configurable up to 3.0dB for 2TX, 4.8dB for 3Tx to 6dB for 4TX. To optimize heat dissipation,
power consumption and SAR values it is recommended to use full power reduction (value "3").
Parameter is global for all interfaces, volatile and will not be reset by
AT&F
.
“1“ Medium Reduction at GMSK (0dB reduction for 1TX and 2TX, 1.8dB for 3TX
and 3dB for 4TX) and Full Power at 8PSK (1TX and 2TX 0dB reduction)
“2“ Maximal Reduction at GMSK (0dB reduction for 1TX, 3dB for 2TX, 4.8dB for
3TX and 6dB for 4TX) and Full Power at 8PSK (1TX and 2TX 0dB reduction)
“3“ (P) Maximal Reduction at GMSK (0dB reduction for 1TX, 3dB for 2TX, 4.8dB for
3TX and 6dB for 4TX) and Maximal Reduction at 8PSK (0dB reduction for 1TX,
3dB for 2TX)
BufferSize
This value defines the default size of the TCP receive queue in bytes. Higher values allow higher throughput but
less number of parallel connections. The total troughput is limited by the GPRS/EDGE network resources and
cannot exceed the theoretical maximum gross throughput of 230Kbit.
Parameter is global for the ME and non-volatile. Use of default value is recommended. If changed the new value
takes effect the next time you start an Internet service with
AT^SISO
.
3000...5200 (&F)(D) ...20000 Size of TCP receive buffer in bytes.
Possible number of parallel socket connections depending on buffer size:
- 5200 bytes (default): max. 8 connections
- 10000 bytes (medium): max. 4 connecitons
- 20000 bytes (high): max. 2 connections
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.
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 while the service is in connected state. If the service is still connecting
(connection setup) another algorithm applies.
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.
<ropr>
(str)(+CSCS)
<tcpBufSize>
(str)(+CSCS)
<tcpIrt>
(str)(+CSCS)
<tcpMr>
(str)(+CSCS)