FEATURES
► Based on 89C51 family based processor
► 40×2 LCD for Display interface and Keyboard entry through IBM
PC Keyboard
► Uses Q2403A Wismo Quick Modules to interface it with
microcontroller
► It has hardware block for doing various experiments
► Mic input with conditioning circuit
► Audio output on Headset
► Keyboard matrix (5×4) for scanning the key codes
► With LCD of 40×2
► SIM socket
► Buzzer
► Understanding of various functions with the use of AT commands
► Various SIM signals like Card Read, Card Clock, Card Presence,
Card Data are available for debugging
► With buzzer provides for incoming call
► External antenna for capturing the incoming signal
► Various examples using AT commands are given for Phone
dialing, SMS Read, Write, Phone book, ADC, General purpose I/O lines, Keyboard interface to Modem are given
► Modem can operate through PC as well as standalone system
directly
► In-built power supply
GSM PARAMETERS
► Multiple Access Method -TDMA / FDMA
► Uplink frequencies (MHz) -933-960 (basic GSM)
► Downlink frequencies (MHz) -890-915 (basic GSM)
► Duplexing -FDD
► Channel spacing, kHz -200
► Modulation -GMSK
► Portable TX power, maximum / average (mW) -1000 / 125
► Power control, handset and BSS -Yes
► Speech coding and rate (kbps) -RPE-LTP / 13
► Speech Channels per RF channel: -8
► Channel rate (kbps) -270.833
► Channel coding -Rate 1/2 convolutional
► Frame duration (ms) -4.615