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This article describes the steps necessary to configure the 

Prerequisites

General

This document assumes that you have already created a Signaling Group and a SIP Server table for the ITSP.

Software Version

Verify that your

System Licenses

The

Configuration Steps

The configuration is comprised of three overall steps:

• Creating a Remote Authorization Table
• Assigning the Remote Authorization Table to the SIP Server Table
• Assigning the SIP Server Table to the Signaling Group for the ITSP

1. Add a Remote Authorization Table.

2. Add a Remote Authorization entry.

3. Assign the Remote Authorization Table to the SIP Server Table.

Additional Information

Call Flow

The call flow below depicts an outbound call from Skype to ITSP via

• After the initial INVITE from the Mediation server, 

  Spacevars
  0 product

  (UA) sends an INVITE request to the ITSP proxy server (UAS).

• Spacevars
  0 product

   then receives 100 Trying and then 401 Unauthorized request from the ITSP proxy server.

• Spacevars
  0 product

  , acting as a UA, then re-sends the request and authenticates itself by including an Authorization header field with the request.
• The Authorization field value consists of credentials containing the authentication information of the UA for the realm of the resource being requested as well as parameters required in support of authentication and replay protection.
• The Realm, Username and Password information are taken from the Remote Authorization Table entry based on the username that is provided by the realm provided by the UAS.

Call Debugging Trace

The 

[2012-04-12 16:17:40,303] 5688 0001 com.net.ux.sip TRACE (Credentials.cpp:451) - computeResponse: creating credentials:
   algorithm : "MD5"
   userName  : "<username string>"
   passWord  : "<password string>"
   realm     : "ITSPRealm"
   nonce     : "ITSPRealmDe98wSj8euJdU8SHs8"
   cNonce    : "baea32a3"
   nonceCount: "00000001"
   qop       : "auth"
   method    : "INVITE"
   uri       : "sip:15105742474@10.0.0.10:5070;user=phone"