Multi-Tech MultiModem EDGE Reference Manual page 38

<firstscan> First Scan over all Radio Bands
"Radio/FirstScan" is a specific band selection feature, designed only to initiate a one-time network search
across all band combinations when the ME is forced to select a network the first time after reboot.
The feature may be activated if the ME is expected to operate in a country using a band configuration other
than the typical European or North American combinations. In most cases, the settings selected with
"Radio/Band" parameter <rba> and <rbp> will do.
Parameter is global for the ME, non-volatile and will not be reset by AT&F. Any change to this parameter takes
effect after reboot.
"0" Disabled. Default.
Band search follows the rules specified for the "Radio/Band" parameter <rba>. So the ME will
try to register to a network within a band or band combination currently visible at the air
interface. If no network can be found the ME will continue to search, but only within the same
band combination.
"1" Enabled
Band search will start within the current band combination. If this band combination provides
only Limited Service or no service at all, the ME starts to scan all other bands, i.e. it will try to
find a band outside the currently visible standard band combination. This mechanism will
override the band settings selected with <rba>.
Bands outside the current band combination will be scanned only one time. If there is still no
appropriate network, the ME will resume the network search in the first band combination.
Conditions for using this mode:
AT+COPS must be set to "Automatic mode" (AT+COPS=0).
Whilst the "Radio/FirstScan" feature is active other band or network selection commands
cannot be used, such as AT+COPS, AT^SNWS or the "Radio/Band" parameters <rba> and
<rbp> of AT^SCFG.
To keep track of all changes you can activate the "band" indicator provided by AT^SIND which pops
Note:
up when another band was selected. To track the network registration status you can activate the
"+CREG" URC.
The result of the band selection can be checked with <rbc>.
<ropr> 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").
The parameter is global for all interfaces, non volatile, and will not be reset by AT&F.
"1"
"2"
"3"
<a52> Ciphering Algorithm A5/2
Defines A5/2 ciphering algorithm availability.
Parameter change takes effect after restart.
Parameter is global, non volatile and will not be reset by AT&F.
Please note that no test and read commands are implemented for the A5/2 feature. To check the set value you
may use the write command AT^SCFG="Security/A52".
"0" A5/2 is unavailable. This setting is permanent and cannot be changed again.
"1" A5/2 is available. Default.
<tcpBufSize> 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 throughput 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......20000
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
Medium Reduction at GMSK and 8PSK (0dB for 1TX and 2TX, 1.8dB for 3TX and 3dB
reduction 4TX
Medium Reduction at GMSK (1TX 0dB, 2TX 3dB, 3TX 4.8dB and 4TX 6dB reduction) and
Full Power at 8PSK (1TX and 2TX 0dB reduction)
Maximal Reduction at GMSK and 8PSK (1TX 0dB, 2TX 3dB, 3TX 4.8dB and 4TX 6dB
reduction). Default.
Size of TCP receive buffer in bytes. Default = 5200
Possible number of parallel socket connections depending on buffer size:
- 5200 bytes (default): max. 8 connections
- 10000 bytes (medium): max. 4 connections
- 20000 bytes (high): max. 2 connections
Chapter 2 – Configuration Commands
38