Hi

Voip provider Ippi allow calls to/from skype users.  For me, this will work quite well in my home pabx, and I do not want to implement the SipThreeSkype solution.  

I have created the gateway and successfully registered to Ippi's sip server at ippi.fr.  Ippi requires that to dial a skype user, the following URI format must be dialed: my-skype-address@skype.ippi.com. (this successfully calls my skype address using a softphone)

I am trying to create a dialplan that will allow me to call a skype user through the Ippi gateway.

This is my gateway setup (notice ippi uses ippi.fr):
<include>
  <gateway name="ippi.fr">
    <param name="username" value="username"/>
    <param name="password" value="password"/>
    <param name="proxy" value="ippi.fr"/>
    <param name="realm" value="ippi.fr"/>
    <param name="auth-username" value="username"/>
    <param name="register" value="true"/>
  </gateway>
</include>

I have the following in the dialplan:

<extension name="ippi-skype">
  <condition field="destination_number" expression="^5000$">
     <action application="set" data="call_timeout=90"/>
     <action application="set" data="hangup_after_bridge=true"/>
    <action application="info"/>
    <action application="bridge" data="sofia/gateway/ippi.fr/my-skype-address@skype.ippi.com"/>
  </condition>
</extension>

Now I realize that according to the wiki, I should not put sofia/gateway/ippi.fr/my-skype-address@skype.ippi.com (ie the @skype.ippi.com), but I need a way to dial out through the ippi gateway (ippi.fr), but to a user in domain skype.ippi.com.  I did try the two following options:
    <action application="set" data="sip_invite_to_uri=my-skype-address@skype.ippi.com"/>
    <action application="export" data="sip_invite_to_uri=my-skype-address@skype.ippi.com"/>

Wireshark gives me the following for a successful call using Jitsi softphone:

Session Initiation Protocol
    Request-Line: INVITE sip:my-skype-address@skype.ippi.com SIP/2.0
        Method: INVITE
        [Resent Packet: False]
    Message Header
        Call-ID: 891b23da468c6fdf05434ac89f123cf1@0:0:0:0:0:0:0:0
        CSeq: 1 INVITE
            Sequence Number: 1
            Method: INVITE
        From: "username" <sip:username@ippi.fr>;tag=35bcc007
            SIP Display info: "username" 
            SIP from address: sip:username@ippi.fr
            SIP tag: 35bcc007
        To: <sip:my-skype-address@skype.ippi.com>
            SIP to address: sip:my-skype-address@skype.ippi.com
        Via: SIP/2.0/TCP 192.168.1.6:62110;branch=z9hG4bK-373232-f15d6a66ae2d195ba99f1d308e43e61d
            Transport: TCP
            Sent-by Address: 192.168.1.6
            Sent-by port: 62110
            Branch: z9hG4bK-373232-f15d6a66ae2d195ba99f1d308e43e61d
        Max-Forwards: 70
        Contact: "username" <sip:username@192.168.1.6:62110;transport=tcp;registering_acc=ippi_fr>
            Contact Binding: "username" <sip:username@192.168.1.6:62110;transport=tcp;registering_acc=ippi_fr>
        User-Agent: Jitsi2.5.5137Windows 7
        Content-Type: application/sdp
        Content-Length: 910

What do I use in the bridge statement so that it calls my-skype-address@skype.ippi.com, using gateway ippi.fr?

Suggestions appreciated!