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.
Dear customer,
we provide Bd white open Cli With a Grate Preice .0290$
and renter all voip switch & vos3000 switch. if you need please contact sales@9telecom.us.
no more today
thanks for you.
Nancy John
Sales manager
9 Telecom Limited
sales@9te