Abstract: A method of configuring Internet telephony services for a private branch exchange includes providing the requirements for the private branch exchange to an Internet telephony service provider, establishing, at the Internet telephony service provider, configuration data for the requirements, providing the established configuration data to the private branch exchange, and processing the established configuration data at the private branch exchange.

Abstract: A method of providing diagnostic functionality in a SIP enabled telephony system includes a plurality of SIP enabled functional elements each provided with a diagnostics agent, the method including transmitting a SIP diagnostics request from an originator diagnostics agent of a first element to a diagnostics agent of a second element.

Abstract: Methods and apparatus are provided for managing Internet communications using a dynamic STUN infrastructure configuration (DSIC). A DSIC server manages communications over the Internet by receiving a registration request from a client; instructing the client to perform a discovery procedure, such as a STUN discovery, to evaluate the NAT that the client is behind; receiving results of the discovery procedure; processing the results of the discovery procedure to evaluate the NAT that the client is behind; and instructing the client to employ a session border controller only if the NAT satisfies one or more predefined criteria. A DSIC client registers with the DSIC server; receiving the instruction to perform the discovery procedure; executes the discovery procedure; provides results of the discovery procedure to the DSIC server; and receives an assigned session border controller for SIP communications only if the NAT satisfies one or more predefined criteria.