chan_h323 (h323) is distributed with Asterisk. asterisk-oh323 (oh323) is 3rd party. We could argue for days about many other details. I'll let others who are not biased discuss this further. Jeremy McNamara P. S I wrote chan_h323 johncn wrote: > Hi, > what's the difference between h323 and oh323 modules? which one should > I use? > Regards.