GM47R5/GM48R5 RADIO DEVICES
11
LZT 123 8020 R1B
emergency calls. Multiparty, call waiting and call divert features
are available. Some of these features are network-operator
specific.
For the inter-connection of audio, the radio device offers both
single ended and balanced analogue input and output lines.
Direct interface to the digital PCM (pulse code modulation) bus
used within the radio device is available, thus by-passing the
internal analogue circuitry.
The radio devices support HR, FR and EFR vocoders. The
GM48R5 also supports the Adaptive Multi Rate (AMR) type of
vocoder.
2.3.4
Data
The radio device supports the following data protocols:
•
GPRS (General Packet Radio Service)
The radio devices are Class B terminals. The radio devices
are GPRS 4+1 enabled, which are capable of receiving at a
maximum of four timeslots per frame (down link), and
transmitting in one timeslot per frame (up link).
•
CSD (Circuit Switched Data)
The radio devices are capable of establishing a CSD
communication at 9.6 kbps.
•
HSCSD (High Speed Circuit Switched Data)
.
The radio devices support HSCSD communication, with one
timeslot per frame capacity in the up link and two timeslots
per frame capacity in the down link (2+1).
2.3.5
SIM Card
An external SIM card with 3 V or 5 V technology, can be
connected to the radio device via its 60-pin system connector.
The unit does not need any external components to enable this.
2.3.6
Power Consumption
Idle
Mode
Transmit/Operation
Voice/CSD
< 5 mA
< 250 mA (< 2 A peak)
GSM 850 and E-GSM 900
Data (GPRS 4+1)
< 5 mA
< 350 mA (< 2 A peak)
Voice/CSD
< 5 mA
< 250 mA (<1.75 A peak)
GSM 1800 and GSM 1900
Data (GPRS 4+1)
< 5 mA
< 350 mA (<1.75 A peak)
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