In article <[EMAIL PROTECTED]>, Doug Lytle <[EMAIL PROTECTED]> wrote: > Tilghman Lesher wrote: > > A straight-through cable to used for connecting from a QuickJack to a T1 > > card, but a T1 crossover is needed for card-to-card (or card-to-channel > > bank, > > for that matter). > > > > I have a Sangoma 102u port 1 to port 2. > > And, my Micoscanner is showing > > 1 -- 5 > 2 -- 4 > 4 -- 2 > 5 -- 1 > > So I went and made a new cable with the > > 1 -- 4 > 2 -- 5 > 4 -- 1 > 5 -- 2 > > The Sangoma worked with that as well. > > Interesting.
1&2 is one twisted pair, 4&5 is the other twisted pair. The difference between the two configurations above is just that the polarity of each pair is reversed at one end, which in this case doesn't appear to matter. Each pair is carrying a balanced signal. Cheers Tony -- Tony Mountifield Work: [EMAIL PROTECTED] - http://www.softins.co.uk Play: [EMAIL PROTECTED] - http://tony.mountifield.org _______________________________________________ Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/ --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
