Matrix
Matrix is a leading manufacturer of telecom equipment for the customer premises (CPE). These solutions can be grouped under following categories – Voice Switching, Voice Messaging, GSM Products and VoIP Products.
SIP protocol was made within IETF (Internet Engineering Task Force) – organization occupied with establishing Internet standards and general standards concerning TCP/IP protocols.
Smart IT
Register an account and call all over the world at low rates (as low as $ 0.007) with no connection fee with per-second billing!
Read moreTop countries:
United States 1294
India 440
United Kingdom 425
Canada 348
Bangladesh 338
China 142
Pakistan 134
Australia 133
Spain 123
Russia 114View all countries