Hi all, I have a working SER version (0.8.11) on RH 8.0.It works very well with default configuration.It funstions as a registrar, proxy and redirect server. {Thanks a lot to iptel fellows} I am using MSN Messanger v4.7 and Windows Messangers as test clients. I read http://www.iptel.org/ser/doc/seruser/seruser.html#AEN1112 and some publications, tutorials and IETF documents on your site http://www.iptel.org/info/players/ietf/ As a part of my Master Thesis a am trying to implement some Services on IP with SIP.Thesis services might look like -IN services like Call Screening, Call forwarding Busy/No answer, Automated call back... -SIP/IP services like Pre-paid Calling card, click-to-dial, call conference... I know that FIFO server is used to write services like click-to dial, but unfortunately, I am little bit confused with that. I read the documentation and examine ctd.sh(Jiri's click-to-dial example) and get "488 Not Allowed Here" response from Windows Messanger because of the REFER method. What I am Asking is: Are there any tools or mechanisms other than FIFO to write services on SER? and otherwise more documentation on FIFO? For example Can I use JCC(Java Call Control) or CPL to work some applications on SER? Do I write a module CPL integrator or JCC integration to SER to use JCC or CPL? Any help? __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree