<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br>
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> This subaddress thing can also be used in SIP with the isub parameter when implemented on the SIP channel (if it's not already).<br>
I would say that the domain part is the main number and the username part of the SIP uri is the subadress. I don't see a need for an additional parameter in SIP, unless you do ISDN over SIP.<br><br>
</blockquote></div><br><div><br></div><div>Yeah - when it's ISDN <------> SIP <-----> ISDN isub parameter is used in the INVITE message.</div>