There is no 4.7 involved. The problem exists on strickly a 5.0 to 5.0 basis.

-----Original Message----- From: Jiri Kuthan [mailto:jiri@iptel.org] Sent: Wednesday, October 29, 2003 7:36 PM To: Rork, Joseph (J.P.); 'serusers@lists.iptel.org' Subject: Re: [Serusers] Messenger5.0 481 Error continued

That's a one-way trick to make 5.0 accept 4.7's instant messages. There is no way to make 4.7 or other standard-based implementation understand 5.0's proprietary messaing model (sending INVITEs to establish a messaging session).

-jiri

At 04:05 PM 10/28/2003, Rork, Joseph (J.P.) wrote:

I've followed the instructions: Attention: instant messaging model has changed from 4.7 to 5.0 dramatically and in a non-standard way. 5.0 takes session establishement using INVITE and drops out-of-dialog MESSAGEs on the floor, whereas sending "481 Call Leg/Transaction...". To permit them, apply the following registry setting: HighSecurityMode HKLM\Software\Policies\Microsoft\Messenger\Client{83D4679F-B6D7-11D2-BF36-0 0C04FB90A03}_Default\EnableSIPHighSecurityMode DWORD= 0 -- Low Security 1 -- High Security 2(Default, same as not set) --- Medium security You need set it to 0 in order to make peer-to-peer IM. Since WM4.7 client is not registered in the LCS server, I guess that WM5 treats it as peer-to-peer call.

And I'm still getting the following error: <<messenger5dump>>

Any ideas?

--joe

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