Redirect

Some signaling protocols support redirecting calls from one location to another. This is usually done by a redirect server which analyzes incoming call information and then terminates the call while specifying another destination.

Redirections are usually triggered by the following call termination reason codes:

• SIP
  • 300 Multiple Choices
  • 301 Moved Permanently
  • 302 Moved Temporarily
  • 305 Use Proxy
  • 380 Alternative Service
• SS7
  • Q.850 Ported Number (14)
  • Q.850 Number Changed (22)
  • Q.850 Redirection (23)

TelcoBridges and redirections

TMG-CONTROL 2.7 and earlier provides basic support for SIP redirection on the NAP from where the outgoing call originated.

TMG-CONTROL 2.8 and later provides support for various redirection behaviors on signaling protocols that support it. These behaviors are:

• Redirection emission: TMG-CONTROL can forge a redirection response instead of routing an incoming call using routing scripts.
• Redirection processing: TMG-CONTROL can process redirection requests through its routing scripts using the specified called or routing numbers. This feature can be used for LNP "dipping".
• Relay: The Tmedia or Tdev unit can be configured automatically relay redirection requests from the outgoing call to the incoming call.
• Drop: The unit can also be configured to drop the request altogether.

Configuration

• Toolpack v2.8