This is a device allowing a user to make VoIP calls using session initiation protocol (SIP). SIP is a telecommunication technology developed as a fast, easy standard for delivering IP-based data, voice, and video communications.
A-Z Wholesale VoIP Termination
Welcome to international wholesale VoIP provider - BS EXPRESS
Having interconnections with up to 100 tier 1 carriers and national telecoms, we provide our customers with the best VoIP services available at competitive