I got calls to go to an IPV6 phone by copying this line from default.xml:

 <param name="dial-string" value="{sip_invite_domain=${dialed_domain},presence_id=${dialed_user}@${dialed_domain}}${sofia_contact(${dialed_user}@${dialed_domain})}"/>

to the user extension.xml and changed it to: (this works fine)

<param name="dial-string" value="{sip_invite_domain=${dialed_domain},presence_id=${dialed_user}@${dialed_domain}}${sofia_contact(internal-ipv6/

${dialed_user}@${dialed_domain})}”/>

my question is do I need to add internal-ipv6 also to presence_id like this:

<param name="dial-string" value="{sip_invite_domain=${dialed_domain},presence_id=internal-ipv6/${dialed_user}@${dialed_domain}}${sofia_contact(internal-ipv6/

${dialed_user}@${dialed_domain})}”/>

Mario G