An implementation of Analog cellular networks like A-Netz, B-Netz, C-Netz, NMT, AMPS, TACS, JTACS, Radiocom 2000, IMTS, MPT1327, Eurosignal and more http://osmocom-analog.eversberg.eu/
Sometimes the sound buffer (ALSA) returns a few more samples than we sent to it. In this case we return 0, which means that no data has to be sent.
This software implements base station protocol of classic mobile phones. With radio transmitter and receiver connected to one sound card and a headset connected to another sound card, it is possible to make and receive calls to and from mobile phone. With SDR (software defined radio) it can be use without radio equipment connected to a sound card, and even multiple channels can be generated simultaniously using SDR. Currently supported networks: * A-Netz * B-Netz (ATF-1) * C-Netz * NMT 450 / 900 (Nordic Mobile Telephone) * AMPS (Advanced Mobile Phone System) * TACS (Total Access Communication System) * JTACS (Japanese version of TACS) * Radiocom 2000 (French network) * IMTS / MTS ((Improved) Mobile Telephone Service) * MPT1327 (Trunked Radio) aka known as 'Buendelfunk' * Eurosignal (ERuRD paging service) * 5-Ton-Folge (ZVEI 5 tone paging code for pager and siren trigger) * JollyCom (Unofficial network, invented by the author) * C-Netz BSC (Connecting to a C-Netz Base Station) Additionally the following communication services are implemented: * TV Transmitter with test Images * Radio transmitter / receiver * Analog Modem Emulation (AM7911) * German classic 'Zeitansage' (talking clock) * POCSAG transmitter / receiver * 5-Ton-Folge + Sirenensteuerung USE AT YOUR OWN RISK! Acknowledgements: Carsten Wollesen for donating Telefunken 4015 B-Netz phone back in the 90's. Klaus Adler for helping me to retrieve complete NMT specification and donating a BSA44 (magnetic card C-Netz hackable phone) back in the 90's. Andy Zauner for providing signaling specification of C-Netz back in the 90's. Hans Wigger for providing valuable information about A-Netz and B-Netz and helping me to get an A-Netz phone. Stephan Hessberger for his work on oebl.de, that provides valuable information about A-Netz, B-Netz, C-Netz, Eurosignal and much more. Friedhelm Hillebrand for providing complete specification of the mobile phone of C-Netz. Mikko Ristila for providing newer NMT specs (with DMS/SMS specifications). Dieter Spaar and Mark Atherton for providing AMPS information and recordings to verify and debug AMPS support. See http://www.idesignz.org/AMPS/AMPS_BS.html for first base station implementation of AMPS. Telecommunication Industry Association for providing TIA/EIA-533 documentation. "Reproduced under written permission from Telecommunications Industry Association." Eric from Smart Card World and Karsten Niehusen from cardomatic.de for providing memory cards to be programmed for older C-Netz phone. Dieter Spaar providing TACS recordings to verify and debug TACS support. Hans Wigger providing Radiocom 2000 recordings, to reverse-enigeer the standard, which seems not to exist anymore... Peter, Peter and Friedhelm and Stephan for providing documentation and hardware for C-Netz Base Station and other C-Netz documents. Carsten Wollesen for donating MPT1327 radios and programming tools.