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.
508comms is a telecommunications service provider, a-z terminations, We are focus on Asia and Middle East.our own terminations is China,Cambodiaindonesia,myanmar,vietnam,Pakistan.sales@508comms.com
Read more