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Holger Freyther holger at freyther.de> On 21 Feb 2017, at 00:50, Harald Welte <laforge at gnumonks.org> wrote: > > Hi Keith, Hi! > we have had hand-over between BTSs working back in 2009, it is for sure > not a new feature at all. This was working long before Abis/IP was > implemented, and yes, it is also working with Abis/IP. I don't know why > Rhizomatica has it disabled. Maybe you were seeing a particular bug or > incompatibility at the time? I don't remember the details but we had several issues with it: * Crashing or no audio (e.g. only used at XC3) * Delay increases by number of handovers Since then we probably fixed the crash, I had removed the timestamp adjustment code. I still need to study the 3gpp AoIP specification but these days I wonder what should be done with the audio stream of the new BTS and I think we should generate a new SSRC, seq and timestamp. This should trigger the start of a new probation period as of Annex A. But it is a theoretical question (or for E1->RTP systems) right now. holger