[jdev] Re: IM history

[Richard Dobson]

> There are other open IM protocols designed around SIP.  See for example 
> RFC3428 and SIMPLE 
> (http://www.ietf.org/html.charters/simple-charter.html).
>
> ICQ and AIM use an AOL proprietary protocol known as OSCAR.
>
> MSN Messenger uses a proprietary protocol known as MSNP.  However, Windows 
> Messenger uses SIMPLE.

Actually Windows Messenger uses both MSNP and SIMPLE depending on who you 
are talking to, some older versions of Windows/MSN Messenger can also use 
RVP which is an old IM protocol used in Exchange 2000.

Richard