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White Paper T310/T312
58 January 2003
Instant messaging/ Chat
Performance and technical characteristics
Feature Support in the T310/T312
Support of instant messaging No
Chat application Yes, SMS as the bearer.
Dimension GSM 900/E-GSM
900
GSM 1800 GSM 1900
Frequency range TX: 880 – 914 MHz
RX: 925 – 959 MHz
TX: 1710 – 1785
RX: 1805 – 1880
TX: 1850 – 1910
RX: 1930 – 1990
Channel spacing 200 kHz 200 kHz 200 kHz
Number of channels 174 Carriers *8
(TDMA)
374 Carriers *8
(TDMA)
299 Carriers *8
(TDMA)
Modulation GMSK GMSK GMSK
TX Phase Accuracy < 5º RMS Phase
error (burst)
< 5º RMS Phase error
(burst)
< 5º RMS Phase
error (burst)
Duplex spacing 45 MHz 95 MHz 80 MHz
Frequency stability +/- 0.1 +/- 0.1 +/- 0.1
Voltage operation (nominal) 3.6 Volts 3.6 Volts 3.6 Volts
Transmitter RF power output 33 dBm Class 4 (2W
peak)
30 dBm Class 1 (1W
peak)
30 dBm Class 1 (1W
peak)
Transmitter Output
impedance
50
Ω 50 Ω 50 Ω
Transmitter Spurious
emission
< -36 dBm up to 1
GHz
< -30 dBm over 1
GHz
(according to GSM
spec.)
< - 30 dBm
(according to GSM
spec.)
< - 30 dBm
(according to GSM
spec.)
Receiver RF level Better than – 102
dBm
– 102 dBm – 102 dBm
Receiver RX Bit error rate < 2.4% < 2.4% < 2.4%