A Hosted VOIP service is a solution using Voice over IP to transport calls over public or private IP networks. Hosted VOIP services are used by businesses to provide local and long distance voice service as well a hosted VOIP phone system for calling features. Hosted VOIP service provides increased efficiency by utilizing IP network access for VOIP calls and a hosted VOIP PBX system regardless of location, and without the need for traditional phone service or onsite PBX system. Hosted VOIP solutions offer the same benefits and features as a traditional PBX and phone service, including caller ID, Direct Inward Dialing (DID), 800 numbers, voicemail, auto attendant, and other calling features. Hosted VOIP PBX service is available in a variety of configurations including analog & digital trunks, ISDN PRI, T1, and SIP handoff. Hosted VOIP service is also known as Hosted IP PBX, Virtual PBX VOIP, Hosted IP Telephony, SIP VOIP, or Virtual PBX Systems.