Tolong jelaskan mengenai Tempo ogé dari GSM dalam bahasa sunda

Alternatif ka hareup pikeun GSM

Kode-kode GSM pikeun layanan tambahan

European Telecommunications Standards Institute (ETSI)

International Mobile Equipment Identity (IMEI)

International Mobile Subscriber Identity (IMSI)

Mobile Subscriber ISDN Number (MSISDN)

Siegmund M. Redl, Matthias K. Weber, Malcolm W. Oliphant (March 1995): "An Introduction to GSM", Artech House, ISBN 978-0-89006-785-7

Siegmund M. Redl, Matthias K. Weber, Malcolm W. Oliphant (May 1998): "GSM and Personal Communications Handbook", Artech House, ISBN 978-0-89006-957-8

Friedhelm Hillebrand, ed. (2002): "GSM and UMTS, The Creation of Global Mobile Communications", John Wiley & Sons, ISBN 0470 84322 5