Presence server is much more than just sending messages. Even w/o presence support SER can proxy text messages and proxy SUBSCRIBEs and NOTIFYs... The difference is that w/o presence, all the subscription creations, terminations as well as maintenance (not mentioning the maintenance of your contact list!!) has to be done at the client-side (your SIP phone that is), which introduces lots of inconveniences and redundant presence-related message exchanges. With presence support, the whole presence thing becomes centralized, which is very convenient. That's all
On 3/16/06, Charles Wang lazy.charles@gmail.com wrote:
hi, all
Can i ask a stupid question? Is the presence server like the MSN to communicate two SIP clients with TEXT messages? Or it is only displays the clients is online or offline?
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