1. 2007-07-20 Re: [Sip-implementors] Question regarding ACK for 2xx sip-imple Bob Beers 2. 2007-07-20 Re: [Sip-implementors] Question regarding ACK for 2xx sip-imple kasnaray\ 3. 2007-07-20 [Sip-implementors] Question regarding ACK for 2xx rep sip-imple Anshuman S. Rawat 4. 2003-03-20 RE: [Sip-implementors] Question regarding ACK hop-by- sip-imple Chris Boulton 5. 2003-03-20 [Sip-implementors] Question regarding ACK hop-by-hop sip-imple Andreas_Byström