Public switched data network

#	Item
21	ENSURING RESILIENT TELECOMMUNICATIONS: A SURVEY OF SOME TECHNICAL SOLUTIONS Cabinet Office Civil Contingencies Secretariat Add to Reading List Source URL: www.gov.uk Language: English - Date: 2013-02-19 05:36:15 Mobile telecommunications Videotelephony General Packet Radio Service GSM Public land mobile network Circuit Switched Data Roaming SMS Universal Mobile Telecommunications System Technology Software-defined radio Mobile technology
22	GSM Call Flow (GSM Originating Call) Cell Mobile Station User Mobile Add to Reading List Source URL: www.eventhelix.com Language: English - Date: 2012-07-07 13:56:33 Electronic engineering Mobile technology Public switched telephone network Release Um interface Cellular data communication protocol Technology Telephony Signaling System 7
23	Intelligent E1 Channel Bank - Data Sheet Add to Reading List Source URL: www.bhumika.ca Language: English - Date: 2009-01-16 15:40:23 Videotelephony Computer telephony integration Business telephone system Voice over IP Public switched telephone network Modem Telephone exchange Telephony Electronic engineering Electronics