User's Manual

SIM900B Hardware Design
Temperature range z Normal operation: -30°C to +80°C
z Restricted operation: -40°C to -30°C and +80 °C to +85°C
(1)
z Storage temperature -45°C to +90°C
DATA GPRS:
CSD:
z GPRS data downlink transfer: max. 85.6 kbps
z GPRS data uplink transfer: max. 42.8 kbps
z Coding scheme: CS-1, CS-2, CS-3 and CS-4
z Supports the protocols PAP (Password Authentication Protocol) usually used
for PPP connections.
z Integrates the TCP/IP protocol.
z Support Packet Switched Broadcast Control Channel (PBCCH)
z CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps, non-transparent
z Unstructured Supplementary Services Data (USSD) support
SMS z MT, MO, CB, Text and PDU mode
z SMS storage: SIM card
FAX Group 3 Class 1
SIM interface Support SIM card: 1.8V, 3V
External antenna Connected via 50 Ohm antenna connector or antenna pad
Audio features Speech codec modes:
z Half Rate (ETS 06.20)
z Full Rate (ETS 06.10)
z Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80)
z Adaptive multi rate (AMR)
z Echo Cancellation
z Noise Suppression
Serial port and
Debug port
Serial Port:
z 7-wire modem interface with status and control lines, unbalanced,
asynchronous.
z 1200bps to 115200bps.
z Serial Port can be used for AT commands or data stream.
z Supports RTS/CTS hardware handshake and software ON/OFF flow control.
z Multiplex ability according to GSM 07.10 Multiplexer Protocol.
z Autobauding supports baud rate from 1200 bps to 57600bps.
Debug port:
z 2-wire interface DBG_TXD and DBG_RXD.
z Can be used for debugging and firmware upgrade.
Phonebook management Support phonebook types: SM, FD, LD, RC, ON, MC.
SIM Application Toolkit Support SAT class 3, GSM 11.14 Release 99
Real time clock Implemented
Timer function Programmable via AT command
Physical characteristics Size: 40mm x 33mm x 3.0mm
Weight: 7g
Firmware upgrade Firmware upgrade over debug port.
SIM900B_HD_V1.03 24.06.2010
14