1. 2018-07-24 [5] [Sip-implementors] Number Translation using Voice sip-imple Rolando Sanch 2. 2018-07-17 [8] [Sip-implementors] Offer/answer model in early media sip-imple Alex Balashov 3. 2018-07-17 [2] Re: [Sip-implementors] is Contact Header Mandatory an sip-imple Dale R. Worle 4. 2018-07-12 [3] [Sip-implementors] RFC 6337, Section 5.3. Hold and Re sip-imple Dale R. Worle 5. 2018-07-04 [8] [Sip-implementors] SIP 422 and RFC 4028 sip-imple Aman