[SIPForum-discussion] IM Design

[Victor Tsoukanov]

----- Original Message ----- 
From: Shanmukharao.Makkapati at airtel.in
To: discussion at sipforum.org
Sent: Thursday, March 22, 2007 8:37 PM
Subject: [SIPForum-discussion] IM Design



Hi to all,

When we design IM using SIP

The modules may be,

1.         we may have to have parser module (to parse incmonibg/outgoing
msges),
2.         core call engine (in case if you want VOIP telephony),
3.         authentication modules to check the validity of the accounts,
4.         network module for data transfer (UDP for IM) and
5.         presence module to provide status of the user (online/offline)..

How these modules will be structered in a sequence to design IM.

Can any one provide me the aritecture of the same in breif please....

Hi

Look at SIP servlet API. First and fourth items already implemetnted in SIP
servlet container, other ones can be implemented with different servlets.
For example, second item (as I understand it is call control) - can be
implemeted with B2B servlet, authentication module and presence module - is
a simple proxy servlets. All this stuff can be collected in one application
with simple dispatcher servlet or controller servlet (there are a lot of
suitable examples for HTTP servlets).