User's Manual

Glossary of Terms

CSD Circuit Switched Data – allows dial-up data

communications.

GPRS General Packet Radio Service – packet switched

(always on) data communication protocol.

GSM originally stood for Groupe Speciale Mobile, but

now it is known as Global System for Mobile

communications

LCD Liquid Crystal Display

LED Light Emitting Diode

SIM Subscriber Identity Module

PIN Personal Identification Number

PUK PIN Unblocking Key