Gang Liu wrote: > Upload your SER script and SIP messages captured by wireshark. > > > regards, > Gang > Looks like the problem was our ser config (we use ser, not openser). My colleague fixed the problem by handling CANCEL's the same way we handle INVITE's. -- Michael Broughton, Advanis Unintended Recipient & Unauthorized Use of E-Mail: This message and attachments may contain confidential or privileged information that is intended only for the named recipient of this e-mail. Any unauthorized use or distribution is not permitted. If you have received this e-mail in error, deleting the e-mail and notifying the sender would be appreciated. Thank you.