Use Cases:SIP Redirect to SIP

Applies to version(s): v2.8 and above

In this scenario, the incoming call is sent to a SIP redirect server, which returns a 3xx message and a new call is sent to the SIP contacts received.

This is the call flow of such a scenario. A 302 Moved temporarily is returned from the SIP redirect server and new calls are made to the SIP endpoints.

Configure Routing Scripts	Configure NAP	Configure NAP Colums	Configure Routes
Configure Routing scripts. Routing Scripts -> Import Script File File-> redirect_routing.rb ScriptType-> Customer Load on startup -> unchecked Routing Scripts -> Select Main Script At start of script: require 'redirect_routing' In the main class: include RedirectQuery before_filter :method => :redirect_query	Configure NAP. When you configure the NAPs, you need these: NAP -> Create New NAP Name-> NAP_REDIRECT_SERVER_A Proxy address-> x.x.x.x (IP of SIP redirect server) You can add more SIP redirect server as needed NAP -> Create New NAP Name-> SIP_NAP_ANY Proxy address-> NONE This will allow calls to be redirected to any IPs using this SIP transport Server	In NAP Columns, set the following: NAP Columns -> Create New Nap Column Name -> group Type Attributes -> integer Default -> 50 NAP Columns -> Create New Nap Column Name -> weight Type Attributes -> integer Default -> 100 NAP Columns -> Create New Nap Column Name -> server_type Type Attributes -> NORMAL|REDIRECT Default -> NORMAL Select REDIRECT for each NAP that is a SIP Redirect server and you can prioritize with group (lowest value is highest priority) and weight (to load balance)	When you Configure Routes, set the following: Routes -> Create New Static Route Name -> To_SIP_Endpoints NAP -> any Remapped_NAP -> SIP_NAP_ANY

Also make sure these settings are applied:

 SIP -> Header Parameters -> Use legacy redirection mode [unchecked] ( old naming convention was: Allow Recurse)
 Profiles -> Edit Reason Cause Mapping -> 302 Moved temporarily-> Route retry action -> Process Call Routing
 gateway -> use Script -> Routing Scripts

Files used for routing scripts

Redirect to SIP files