Hi Steve, SU> If you are using CTR4, then I guess they use CTR4. :-) SU> CTR4 == Net 5 == various other names == EuroISDN.
Attempt #2: Reasonable logic and _good_ assumption (this time)... It would appear that Manchester IS the NTL region in the UK that supports ISDN 110 (ETSI EuroISDN etc.). Maybe this is because Manchester was an old Mercury/C&W operation before it changed hands to NTL?!? I know they have DMS and Nokia switch equipment so maybe they don't have the Marconi System X ISDN 85 service for Q.931 deployment... So, it's good news for Tim, who can now deploy * without risk. However it's bad news for ISDN 85 customers as we failed to obtain the traces we need to move the incompatibility problem forward when we set-up * and an analyser today. One interesting find was that CRC4 was not enabled on the Q.931 circuit from NTL (despite the standards) at Tim's site, something to remember if you're planning an install on an NTL PRI in Manchester. It's looking like a stint in a switch site is required to gather the traces unless anyone else in NW UK has an ISDN 85 PRI we could run a quick test against? Regards Darren -- Comgate Telco>Internet<Broadcast t: +44(0)700 COMGATE -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Storer, Darren Sent: 28 May 2004 09:32 To: [EMAIL PROTECTED] Subject: RE: dialogic was RE: [Asterisk-Users] "Glare" condition - How well does asteriskhandle? Hi Steve, SU> If you are using CTR4, then I guess they use CTR4. :-) SU> CTR4 == Net 5 == various other names == EuroISDN. Reasonable logic but bad assumption in this case. The Dialogic Q.931 stack (D/300, DM3 etc.) is solid and quite tolerant of ISDN 85 as are most hardware PBXs. Other (PC based) products exhibit exactly the same fussy behaviour though; the Digi RAS products ( http://tinyurl.com/36e7l ) work well with EuroISDN but won't work with ISDN 85 so the Asterisk stack is not alone in freaking when presented with this "Frankenstein Protocol" of the ISDN world. (Thanks a bunch BT/Marconi/GPT et al who rushed ISDN85 into service because they didn't want 18 months of effort to delay real Q.931 deployment in the UK, so they bolted a protocol converter on the end of existing DASS line cards instead of developing a native solution...ugly stuff!) I would like to try to help Tim decide which version of PRI he has as I'm local to him, let's see if he takes me up on the offer to plug a working * box into his PRI... Even if he has ISDN85 we would still benefit from the chance to capture the failure (using an MPA) and compare it to some good (working) * traces from a real EuroISDN circuit. Then the fun starts trying to find a neat way to patch the stack... Regards Darren -- Comgate Telco>Internet<Broadcast -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Steve Underwood Sent: 28 May 2004 01:39 To: [EMAIL PROTECTED] Subject: Re: dialogic was RE: [Asterisk-Users] "Glare" condition - How well does asteriskhandle? tim panton wrote: > Steve Underwood wrote: > >> Jason Williams wrote: >> >>> At 09:16 27/05/2004 -0500, you wrote: >>> >>>> Maybe the time and effort would be better spent finding out why the >>>> Digium card won't work on the NTL's PRI and either fixing it or >>>> providing the information and testing facility to someone who can. >>> >>> >>> >>> >>> >>> NTL's PRI uses ISDN 85 not q931 so a ne protocol stack would need >>> to be written. >> >> >> >> I think you means ISDN 85 not EuroISDN. >> >> Good heavens. I thought ISDN 85 died out in about 89. :-) >> >> I don't know where you would get the spec these days, but it >> shouldn't be a lot of work to modify libpri to add another variant of >> ISDN. >> > > I should say that I don't _know_ what NTL are delivering me, > I haven't (yet) tried it with a digium E1 card. > > What I do know is : > 1) the dialogic card claims to be running CTR4 on an E1 ISDN PRI > 2) other folks on this list have had difficulty getting digium > cards to talk to NTL. > 3) exactly the same dialogic config works on BT and the Dutch > PTT's E1 lines. > > So it _may_ not be a problem for me as NTL is a patchwork of smaller > telcos, my area (Manchester) may be more up to date. > > Anyone know an easy way to tell what I've got ? > (or will I have to ask NTL -aaaagh) > > T. If you are using CTR4, then I guess they use CTR4. :-) CTR4 == Net 5 == various other names == EuroISDN. It sounds like you are OK. Regards, Steve _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users