Thanks for your input, Phonemeister. I have tried adding a pause after the extension and before the release, but the problem was still there, although it did seem to help with the frequency. I've added another pause following the release and that seems to have cleared the problem. I've been making numerous test calls to my IP phones and I have been talking to a few of those users and the problem appears to be gone. I will keep testing through tomorrow to really see if its fixed.