I haven't tried this with Asterisk, but by chance just answered What are the XMPP/Jabber connection settings (domain/port) for HipChat Cloud? - I would assume the required settings are the same, so you might want to check into my resp. answer for details, plus Paul's additional remarks regarding conference usage.
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...able to use the clients After a bunch of testing (rooms, memberships, check for private message history, and most importantly - the custom emoticons!) nearly everything was looking as we needed, however...
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