I am sending this jingle message to our server
<iq from="def6121efe5a48f095faad2108f24c35@server" id="G22eiAgZ" to="695bac37b9cb426d97fae6c2ef8470f6@server" type="set">
<jingle xmlns="urn:xmpp:jingle:1" sid="nqbtDEoLNivp" action="session-initiate" initiator="def6121efe5a48f095faad2108f24c35@server">
<content creator="initiator">
<description xmlns="urn:xmpp:jingle:apps:stub:0" />
<transport xmlns="urn:xmpp:jingle:transports:stub:0" />
</content>
</jingle>
</iq>
and receives below message
<iq xmlns="jabber:client" type="error" id="G22eiAgZ" from="695bac37b9cb426d97fae6c2ef8470f6@server" to="def6121efe5a48f095faad2108f24c35@server/avw6co4qgb">
<jingle xmlns="urn:xmpp:jingle:1" sid="nqbtDEoLNivp" action="session-initiate" initiator="def6121efe5a48f095faad2108f24c35@server">
<content creator="initiator">
<description xmlns="urn:xmpp:jingle:apps:stub:0" />
<transport xmlns="urn:xmpp:jingle:transports:stub:0" />
</content>
</jingle>
<error code="503" type="cancel">
<service-unavailable xmlns="urn:ietf:params:xml:ns:xmpp-stanzas" />
</error>
</iq>