As its name implies, FreeSWITCH will "switch" or "connect" various endpoints together. A part of this switching involves making semi-permanent connections to individual telephones or telephone service providers. Service providers are usually telephone companies (telcos), or Internet Telephony Service Providers (ITSP). Continue reading to learn more about the many ways in which FreeSWITCH can connect your telephone to the world.
The recipes in this chapter will delve into the various ways to connect FreeSWITCH to telephones and service providers. FreeSWITCH can also connect to Skype using
mod_skypopen. The last recipe is for advanced users, and discusses the subject of codec negotiation.