AT Command Reference Guide for EDGE Wireless ... - wless.ru
AT Command Reference Guide for EDGE Wireless ... - wless.ru
AT Command Reference Guide for EDGE Wireless ... - wless.ru
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Chapter 2 – Configuration <strong>Command</strong>s<br />
The parameter determines the maximum range of the bands allowed. The value may be one of the<br />
single bands listed below or all valid combinations from the values 1, 2, 4 and 8. Thus, the value range of<br />
is “1”..”15”. To select or deselect a band calculate the sum of the values of all desired bands and enter<br />
the resulting value. For example, <strong>for</strong> 1800 MHz (2) and 850 MHz (8) please enter the value (10).<br />
Parameter is global <strong>for</strong> the ME, non-volatile and will not be reset by <strong>AT</strong>&F.<br />
“1“ GSM 900 MHz<br />
“2“ GSM 1800 MHz<br />
“4“ GSM 1900 MHz<br />
“8“ GSM 850 MHz<br />
“3“ GSM 900 MHz + GSM 1800 MHz<br />
“5“ GSM 900 MHz + GSM 1900 MHz<br />
“10“ GSM 850 MHz + GSM 1800 MHz<br />
“12“ GSM 850 MHz + GSM 1900 MHz<br />
“15“ all bands<br />
Preferred Radio Band(s)<br />
The parameter may be one of the single bands or one of the four dual-band combinations listed below.<br />
All preferred bands must be contained in the range of allowed bands (see ), invalid combinationsare not<br />
accepted. To give priority to a certain single band or band combination and suppress all others simply select the<br />
same value both <strong>for</strong> and .<br />
primarily serves to trigger the network search; i.e., it is only used one time <strong>for</strong> searching and selecting a<br />
network. As the currently used band depends on the availability of the allowed networks, the value indicated by<br />
may be different from . Also, the next time a network search is necessary (<strong>for</strong> example, after restart)<br />
the ME will first try to reselect the network last used, which may be different from the value of last given.<br />
There<strong>for</strong>e, the setting of will not be saved.<br />
The value range of is “1...12”, but only the band(s) selections listed below are allowed. Trying to set an<br />
unsupported value will be denied with “ERROR”. To select or deselect a band calculate the sum of the values of<br />
all desired bands and enter the resulting value. For example, <strong>for</strong> GSM 1800 MHz (2) and GSM 850 MHz (8)<br />
please enter the value (10).<br />
“1“ GSM 900 MHz<br />
“2“ GSM 1800 MHz<br />
“4“ GSM 1900 MHz<br />
“8“ GSM 850 MHz<br />
“3“ GSM 900 MHz + GSM 1800 MHz<br />
“5“ GSM 900 MHz + GSM 1900 MHz<br />
“10“ GSM 850 MHz + GSM 1800 MHz<br />
“12“ GSM 850 MHz + GSM 1900 MHz<br />
Currently Selected Radio Band(s)<br />
The band(s) indicated with are all allowed bands found at a location area. This means, if prompted to<br />
select a network the ME will search <strong>for</strong> these networks only. The value can be either a single band or a dualband<br />
combination.<br />
is only a response parameter returned either after sending the read command <strong>AT</strong>^SCFG or writing<br />
<strong>AT</strong>^SCFG=”Radio/Band”.<br />
In addition to and to allow the subscriber to be notified whenever the selected band changes it is<br />
recommended to activate the “+CIEV” (see Section 3.3, <strong>AT</strong>^SIND).<br />
“1“ GSM 900 MHz<br />
“2“ GSM 1800 MHz<br />
“4“ GSM 1900 MHz<br />
“8“ GSM 850 MHz<br />
“3“ GSM 900 MHz + GSM 1800 MHz<br />
“5“ GSM 900 MHz + GSM 1900 MHz<br />
“10“ GSM 850 MHz + GSM 1800 MHz<br />
“12“ GSM 850 MHz + GSM 1900 MHz<br />
Radio Output Power Reduction<br />
According to 3GPP Rel99, output power reduction <strong>for</strong> multiple TX slots is a mandatory feature. The amount of<br />
power reduction is configurable up to 3.0dB <strong>for</strong> 2TX, 4.8dB <strong>for</strong> 3Tx to 6dB <strong>for</strong> 4TX. To optimize heat dissipation,<br />
power consumption, and SAR values, it is recommended to use full power reduction (value “3”).<br />
The parameter is global <strong>for</strong> all interfaces, non volatile, and will not be reset by <strong>AT</strong>&F.<br />
“1“ Medium Reduction at GMSK and 8PSK (0dB <strong>for</strong> 1TX and 2TX, 1.8dB <strong>for</strong> 3TX and 3dB<br />
reduction 4TX<br />
“2“ Medium Reduction at GMSK (1TX 0dB, 2TX 3dB, 3TX 4.8dB and 4TX 6dB reduction) and<br />
Full Power at 8PSK (1TX and 2TX 0dB reduction)<br />
“3“ Maximal Reduction at GMSK and 8PSK (1TX 0dB, 2TX 3dB, 3TX 4.8dB and 4TX 6dB<br />
reduction). Default.<br />
Multi-Tech Systems, Inc. <strong>AT</strong> <strong>Command</strong>s <strong>for</strong> <strong>EDGE</strong> Modems (S000371B) 33