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 First-SIP connection for access. SIP Trunking 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.
SIP Trunking delivers inexpensive local, toll-free, domestic and international long distance service through the First-SIP 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 7,000 rate centers, First-SIP can provide new or port existing numbers nationwide.
First-SIP takes a proactive approach to solving your technology needs. Let us provide you with a free assessment. If you have questions or if you would like to discuss a particular application with a data engineer, please call (210) 807-9225 or use our Contact Form.