77Glossary of TermsGlossary of TermsCSD CSD means one of communication methods of the data communication service. (It is abbreviation ofCircuit Switched Data)DTMF Tones Dual Tone Multi-Frequency tones allow you to communicate with computerised phone systems, voicemailboxes etc.EMS EMS is one of the mail systems which use the cellular phone, and service by which data of e-mail ofthe text etc. can be transmitted and received. (It is abbreviation of Enhanced Messaging Services)GSM Global System for Mobile Communications. The name given to the advanced digital technology thatyour phone uses.Network Operator The organization responsible for operating a GSM network.Password Used for the control of the Call Bar. Supplied by your service provider.PIN Personal Identification Number used for SIM security. Supplied by your service provider. If the PIN isentered incorrectly 3 times, the PIN will be blocked.PIN2 Personal Identification Number used for the control of Fixed Dial Store and Call Charge metering. Ifthe PIN2 is entered incorrectly 3 times, the PIN2 will be blocked.PUK/PUK2 PIN/PIN2 Unblocking Key. Used to unblock the PIN/PIN2. Supplied by your service provider. If thePUK/PUK2 is entered incorrectly 10 times, the PUK/PUK2 will be blocked.Registration The act of locking on to a GSM network. This is usually performed automatically by your phone.Roaming The ability to use your phone on networks other than your Home network.Service Provider The organization responsible for providing access to the GSM network.g50-end.fm Page 77 Wednesday, July 30, 2003 8:59 AM