All, I have two Questions to clarify: 1. I just want to know do any body has tried to compile pjsip libraries with Windriver vxworks 5.5 or later version. 2. Is PJSIP application suitable for an IPBX. I see it is more suited for an endpoint solution. Some tips will really help in evaluating PJSIP for an hardware which supports 200+ ports. Regards, Murali