2009/1/24 Matthew Fredrickson <[email protected]> > Olivier wrote: > > Hi, > > > > As you may know, these ISDN BRI features are very important here in > > Europe as ISDN Basic Rate Access is very popular among Small & Medium > > Entreprises. > > I don't really know why but it seems that in many countries, default is > > to install small PBX using Point-to-Multipoint (PtMP) mode as opposed to > > Point-to-Point (PtP) which is the norm for PRI. > > > > So basically, in several countries, SME are equipped today with PBX > > connected with TE/PtMP interfaces to telco BRI lines. > > When we address those SME, my opinion is that it's very useful to be > > able to support any combination of TE/NT, PtP/PtMP modes. > > > > Latest 1.6 Asterisk and 1.4.8 Libpri introduced a new set of welcomed > > ISDN BRI features. > > Unfortunately, NT/PtMP is not available at this time, in latest > > Zaptel/Asterisk/Libpri. > > > > My question is "what is the policy concerning NT/PtMP ?" > > Is it really hard to extend Libpri to support this mode ? > > Or shall mISDN remain the way to go when NT/PtMP is needed ? > > Hey Olivier, > > I actually was the one that did a lot the work in adding the BRI support > to libpri/chan_dahdi.
I know how much we owe you for BRI support and lipri in general and I really thank you for that. > > > NT PTMP is very significantly different, in that you have to do much > more from a TEI management perspective. > > Most people's needs that I saw were actually fulfilled in using either > NT or TE PTP or TE PTMP, since they were interfacing with PBXs or using > TE-PTMP trunks from the telephone network to provide voice trunks for > Asterisk. >From my point of view, the most important feature is TE-PTMP as this the one used here (in France) when connecting a new Asterisk-based IPBX to ISDN (I really don't know why TE-PTP is not used for that). >From the same point of view, 2nd most needed feature is NT-PTMP when connecting legacy PBX to Asterisk (for the very same reason, those PBX use TE-PTMP). If others could join this thread and say if they agree or not with NT-PTMP being the 2nd most needed mode, would be great. Please, do not hesitate to comment. > > > Right now, I would not preclude the possibility that NT-PTMP support > might be added, but I could not give you a concrete time at which it > will be done, since it will probably require some significant internal > changes in libpri. > > To answer your final question, for now, if you need NT-PTMP mode, you > should use mISDN. I'm afraid this mISDN option is not very encouraging these days : - misdn mailing list is not working these days (I'm hoping I'm wrong but it seems to be the case), - mISDN won't compile on latest 2.6.26 kernels so maybe mISDN developpers are thinking B410P features inclusion in 1.6 sets a mark in Asterisk BRI policy and it's not worth developing mISDN anymore. So my opinion is that these NT-PTMP is really and urgently needed, especially if this TEI management is rather complex and therefore would take a long time to develop and stabilize. The alternative is to keep using those Patton, Quintum, etc ... boxes which is not what we would prefer ;-)) I don't want to be misunderstood while writing this memo : - a very good job have been made lately in dahdi/libpri with "B410P inclusion" - if others are thinking NT-PTMP is needed or disagree with that, let them say it here and now, as it might take a long time to integrate this feature Regards > > Matthew Fredrickson > Digium, Inc. > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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