thanks to all for your help i've keeped busy myself reading tons of documentation at http://www.voip-info.org/ and http://idsn.jolly.de and between pratical hw/sw experiences and theory ... i'm stuck. my configuration should be the following: hardware idsn nt1 ----> input isdn card on asterisk ----> output isdn card on asterisk ----> outer isdn line i'm quite sure that sw side is correct and, again, i've got doubts on the cables, since your two responses (thanks a lot to Alex and Emanuele {ciao}) are opposite. i've made 2 cables, following the schemes one here: http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a008010ef6c.shtml and the second here: http://www.gcom.com/home/support/t1crossover.html and both don't work. so my questions are: is my configuration possible ? again, which cable should i use ? it's correct to mod an ethernet cable ? should i put the 100 ohm resistors somewhere ? (Emanuele: you wrote that the bus should be terminated, but the resistors should not be on the cable itself; where should they go ?)
before that configuration i've tryied the basic one: asterisk with one isdn card ---> pstn and all worked like a charm sorry for that boreness, i'm a newbye smashing his brain on telephony technology jargon from only one week, for sure i'll publish a detailed how-to on that project as soon as all that stuff starts to work thanks to everyone mike On Mon, 2005-05-23 at 18:08, Emanuele Pucciarelli wrote: > Stankiewicz Michael wrote: > > thanks a lot, > > i've googled around hunting for an answer to my biggest doubt: the > > cross-cable. > > i understand that it looks like an cat-5 cross-cable and how it has to > > be done, but ... why 8 wires ? > > The plug is a standard RJ45 one, but only the 4 inner wires are used. > Sometimes you need the outer wires to carry power, but I believe you > shouldn't cross them. > > I strongly suggest that you do NOT use the T1 cable schemes, since they > do not have much to do with the S0 BRI bus. The link I mentioned in the > last message (isdn.jolly.de) carries the information you need, and I can > assure you it works (without even the NT). > > If you connect a "live" NT (hooked to the central office) to Asterisk to > access your ISDN line, then you are going to use a card in TE mode, > without any special configuration, and a normal, off-the-shelf ISDN cable. > > Regards, _______________________________________________ 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
