Blocks unwanted calls using caller ID and a modem
Free billing to Asterisk
The USAID-funded SPICE program, implemented by the Open Institute.
AT commands as input are sent to modem and responses given as output.
Linux GUI USSD Sender
Android Telemarketing (Junk) call blocker
programm to handle a USB-B2K box
Small and effective program for SIP traces anonymization
Phone call cost calculator
Implementation Of Cognitive Radio Using USRP And OpenBTS