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• CSD (Circuit Switched Data)
The GS64 wireless modem is capable of establishing a CSD communication at 9.6
kbps over the air.
2.3.5 GPRS Multi-Slot Support
GSM Multi-slot classes supported by Gx64 devices
Maximum slot allocation
Multislot Class
Downlink Uplink Active
Allowable
Configuration
Max data rate
8 4 1 5 1 up; 4 down
8-12Kbps Send
32-48Kbps Receive
1 up; 4 down
8-12Kbps Send
32-48Kbps Receive
10 4 2 5
2 up; 3 down
16-24Kbps Send
24-36Kbps Receive
2.3.6 SIM Card
The GS64 supports an external SIM card through its system connector. Both 3V and
1.8V SIM technology is supported. Older, 5V SIM technology is not supported.
A mechanical variant of the GS64 also supports an on-card SIM. For dual SIM
support, automated SIM-switching is available. Only one SIM is active at any one
time, it is not possible to concurrently register on more than one network.
2.3.7 Power Consumption
Feature
Sleep Mode
DRX 8
Idle Mode
Transmit
Operation
Voice/CSD
GSM850 & E-GSM900
Data (GPRS)
1.6 mA 17 mA 2000 mA
Voice/CSD
GSM1800 & GSM1900
Data (GPRS)
1.6 mA 16 mA 1450 mA
The power consumption figures shown represent average current for maximum
transmitted power, single uplink (transmit) slot, single downlink (receive) slot. The
module will consume more average power in different multi-slot configurations, the
worst case being that of two uplink and three downlink slots.