Setup SIP sever yourself OR rent? CTS give you advice
Install and configure basic call in and out, sip trunk, recording, etc. and system maintenance
Cooperate with North America and Europe telecom service provider (ITSP), CTS provider low international call rate with VOIP
Provider 40 country 500 city SIP DID number in world
Need other SIP related requirement? Call us now and get advice from CTS
