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Use Cases:SIP Redirect to SIP: Difference between revisions

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Revision as of 16:30, 22 October 2018

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.

Redirect to SIP.png


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.

SIP Redirect callflow process v2.png

Configure Routing Scripts Configure NAP Configure NAP Colums Configure Routes
  • Configure Routing scripts.
    • Routing Scripts -> Import Script File
    • 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 -> Allow Recurse [unchecked]
 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