SIP for FreeSWITCH

Two primary components make up a business phone system. The first is the software that handles call control and other phone system features such as conferencing, voicemail, automated attendants and others. This is often referred to as the PBX. FreeSWITCH plays the role of the PBX. The second necessary component is a way to deliver calls to the network that routes them to their intended recipient. This network is called the PSTN (public switched telephone network). In a traditional phone system, carrier provided PRI (primary rate interface) lines connect the PBX to the PSTN. SIP is an alternative that uses data lines, rather than telephone lines to make the connection. Customers choose to deploy SIP for FreeSWITCH using SIP.US to gain a variety of benefits:

• Using SIP.US with FreeSWITCH is usually much less expensive than traditional telephone lines
• Traditional PRI lines are sold in groups of 23 channels. SIP.US allows customers to subscribe to as few as one channel at a time, giving customers the flexibility to pay for only what they need now
• Although some SIP trunking providers require clients to purchase Internet connectivity from them, SIP.US does not. Our clients choose the Internet bandwidth provider that makes the most sense for their needs and budget
• SIP.US comes with a powerful, easy-to-use online interface for administration of your SIP trunk
• We utilize only Tier-1 upstream providers to route our traffic, giving our customers the most reliable network available
• SIP.US has been thoroughly tested with FreeSWITCH. They are used together in deployments across the US.