Selecting a routing mode for a call session

A network device for routing a call, comprising:

• an input operable to receive a request to initiate a call session for a call from a caller endpoint to a callee endpoint, the caller endpoint belonging to an internal network of a network system;
• a mode selector coupled to the input and operable to:
• determine whether the call is internal or external;
• select a routing mode in accordance with the determination, the routing mode selected from a redirect mode and a feature server mode;
• and
• route the call according to the selected routing mode.

Logic for routing a call, the logic embodied in a medium and operable to:

• receive a request to initiate a call session for a call from a caller endpoint to a callee endpoint, the caller endpoint belonging to an internal network of a network system;
• determine whether the call is internal or external;
• select a routing mode in accordance with the determination, the routing mode selected from a redirect mode and a feature server mode;
• and
• route the call according to the selected routing mode.

A system for routing a call, comprising:

• means for receiving a request to initiate a call session for a call from a caller endpoint to a callee endpoint, the caller endpoint belonging to an internal network of a network system;
• means for determining whether the call is internal or external;
• means for selecting a routing mode in accordance with the determination, the routing mode selected from a redirect mode and a feature server mode;
• and
• means for routing the call according to the selected routing mode.

A method for routing a call, comprising:

• receiving a request to initiate a call session for a call from a caller endpoint to a callee endpoint, the caller endpoint belonging to an internal network of a network system;
• determining whether the call is internal or external by:
• establishing whether network address translation would be required;
• determining that the call is external if network address translation would be required;
• if network address translation would not be required, establishing whether the caller endpoint and the callee endpoint are internal endpoints, and determining that the call is internal if the caller endpoint and the callee endpoint are internal endpoints;
• selecting a routing mode in accordance with the determination, the routing mode selected from a redirect mode and a feature server mode, the redirect mode further comprising providing the caller endpoint with an address of the callee endpoint, the address allowing the caller endpoint to communicate directly with the callee endpoint, the feature server mode further comprising converting the call between an internal communication protocol of the internal network and an external communication protocol of an external network, the routing mode selected in accordance with the determination by:
• selecting the redirect mode if the call is internal;
• and
• selecting the feature server mode, otherwise;
• and
• routing the call according to the selected routing mode.