[Freeswitch-users] How to block CHAT done by using Twinkle

[lakshmanan ganapathy]

Hi all,
 Can any one please tell me how to block only a particular SIP packet,
especially MESSAGE packet.

The reason is,

The users are using Twinkle as softphone, and they are able to CHAT with
other users. Now I want to disable the CHAT message. When I looked into the
logs and sip trace, I found that the packet exchanged during CHAT is
"MESSAGE" packet. So is there any way to block this packet alone?? or is
there some other way to disable the CHAT??
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