Shenzhen Coban Electronics Co. Ltd. CB900 用户手册
GSM Audio
Telephony
Emergency call
Half Rate, Full Rate and Enhanced Full Rate (HR/FR/EFR)
Adaptive Multi-rate (AMR)
Hands-Free Operation
Echo Cancellation (Enhanced AEC)
Noise Reduction
DTMF (encoding only)
SMS
Point-to-point (MO/MT)
Cell Broadcast
Text and PDU mode
GPRS
Class 12/10/8
Mobile Station Class B
Coding Schemes MCS1 – MCS4
TCP Stack, UDP Stack
HTTP Stack, FTP Stack
PPP Stack
2.3. RF Frequencies
RF functionalities comply with the GSM Phase II GSM 850/EGSM 900/DCS 1800/PCS 1900
recommendations.
The frequencies covered are:
Tx GSM850: (824 ~ 849 MHz)
Tx EGSM900: (880 ~ 915 MHz)
Tx DCS1800: (1710 ~ 1785 MHz)
Tx PCS1900: (1850 ~ 1910 MHz)
Rx GSM850: (869 ~ 894 MHz)
Rx EGSM900: (925 ~ 960 MHz)
Rx DCS1800: (1805 ~ 1880 MHz)
Rx PCS1900: (1930 ~ 1990 MHz)
2.4. Baseband Functionalities
The Baseband is composed of an ARM, The digital baseband power supply is 1.2V and the digital
IO power supply is 1.8V.
2.5. Interface Specifications
Feature
Description
68-pin LCC
Power Supply
Back-up Battery
Keypad
2 Serial Link UART
USB 1.1