Why am I using version 3 I hear you ask! Well I tried V3.1 some time ago on a SBS server. This worked ok, a few tempermental problems but I was unable to send my caller ID (this is a VoIP trunk) I have now set up a dedicated Win XP box just for 3CX, it has a static public IP address, no fire wall running V5.1. I have wasted weeks trying to get this to work properly with out success - no voice mail - no caller ID etc. So I have re-installed v3.1, the pbx works, the voice mail works. The only thing that does not is outbound caller Id. I have trawlled the forums but with out any success. Any clear suggestions will be welcome.