Session Initiation Protocol (SIP) is the common signaling standard for real-time communications including Voice over Internet Protocol (VoIP). SIP is an open-standard which allows carrier voice equipment to interoperate seamlessly with customer premise equipment (CPE). The logical voice channel established between them is referred to as a SIP Trunk; a virtual phone line that utilizes a Broadband connection for access.
As your SIP trunk provider, Cloudtel works directly with an IP PBX as well as with legacy customer premise equipment (CPE) which uses an Integrated Access Device (IAD), commonly referred to as a gateway.
Cloudtel SIP Trunking delivers inexpensive local, toll-free, domestic and international long distance service through the Cloudtel’s national footprint covering North America with per trunk and per minute rates much lower than that of traditional service. Also, with phone numbers from over 5,000 rate centers, Cloudtel can provide new or port existing numbers nationwide.