On Thursday 08 February 2007 15:06, Alexandre Ghisoli wrote: > I was working on a project, maybe 15 years ago, where we developped a > "modem" to transfer data : > 1/ during setup, for free > 2/ during the blanks of a conversation (approx 80% of the time, because > only one speaks at time, so you got a free 64kbps channel :)) > > This takes not very long until telco notice the D channel trafic, and > since then, they charge for alerting, even if no answer (maybe 10% of > unanswered call) to cover this trafic costs. I can't say I have ever seen these costs mentioned anywhere for wholesale termination, but they might be mentioned in the T&C, and only applied if they detect a strangely high percentage of bad calls.
Actually, I would be quite happy if they opened-up this mechanism, and did charge something (like 10% of the CPM) for it for those end-users who wanted the service. it would allow seeing extended user identification for people not yet in your contacts book, and quick saving of contacts without typing their names. (amongst a whole range of other uses) > So, second part was to cut additional messages (SETUP DISPLAY) between > network (aka roaming or international call). This need a more deeper > test, but IMOO, this *could* be working on some networks, and probably > not on some other. > > Now, about GSM networks and Gateways, I really dont know if this is a > 1:1 passtrough .. > I think some testing would be usefull, although I it will probably not work reliably across networks... I still have a 4E1 Didgium board lying around somewhere begging for something usefull to be done with it... Richard _______________________________________________ OpenMoko community mailing list community@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/community