Juha Heinanen wrote: > Paul Kyzivat writes: > > > Perhaps this depends very heavily on exactly what is retargeting and > > what is not. If I call the Dr and get the answering service is that > > retargeting? If I call the boss and get the secretary is that > > retargeting? I I call you on your land line and get forwarded to your > > mobile line is that retargeting? If I call a help line and get > > forwarded to a call center worker is that retargeting? > > i don't see any problem if callee has configured his proxy or phone to > perform those actions, but i see a big problem if callee returns 302 to > the caller and caller's phone or proxy acts on it without informing the > caller.
If the caller is picky about who he ends up talking to then I don't see what difference it makes whether the retargeting is processed by a proxy or the UAC. And if the caller is concerned about picking up the charge for a call to an unanticipated address then it is just an issue of whether it is going to get the bill, not who does the retargeting. I know we traditionally avoid billing issues, but there are a whole class of architectural issues such as this that we can't address without considering charging. IMO a fundamental flaw in charging systems is assuming that the caller can infer the charging algorithm that will be used for a call based on the *form* of the address. By that I mean: - whether caller or callee pays - per minute rate, etc. This of course gets all screwed up if payment responsibility or rate for a call changes as a result of retargeting. But its somewhat of a problem even without retargeting. The kinds of problems I am aware of are: - caller isn't always aware of the mapping from address to charging algorithm, so may be charged more than anticipated - relying on form makes dialing rules difficult (do I start with "1" or not? It sometimes depends on which UA dialing is initiated.) - there is a shortage of desirable "free phone" numbers, because of the limited forms for them. Adding new freephone prefixes aggrevates the prior propblem of callers knowing the algorithm. - to date there is no precedent for "freephone" addresses conforming to "email" syntax. _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
