Also note that the Smart Jack allows the Telco to provide T1 Signalling in places that it couldn't in the past, most smart jacks that I have used are:
[CO]<-Optical->[Hut DMS]<-->[Hut Smart Jack]<-HDSL->[CPE Smart Jack] For the list, Telco Techs, mostly do as they are told, and are schooled by the Telco vendors. On 4/24/06, Rich Adamson <[EMAIL PROTECTED]> wrote: > Alexander Lopez wrote: > > I was once told by a lineman that the cables they use didn't have that > > many twists in them because it wasn't needed, and that the extra twists > > would effectively use more cable and thus cost and weigh more than > > triple what they do now. > > Good thing he doesn't work for a cable manufacturer as that's a total > crock of crap that even an inexperienced person should be able to > detect. (You can't twist two wires to make them weight three times as > much, or cost three times as much.) > > > He told me that with the number of twists in > > the Cat 5 cable it would cancel out any interference, but he also stated > > that the effective length was calculated using a cable with less twists > > and subsequently 'less dense' and that if using a Cat5e cable you must > > factor that in. so if you use cat5e cable your are fine but you can't go > > as far. > > Essentially true, but the impedance of a T1 cable is different from Cat5 > cables, which is one of the primary factors in limiting distance. Has > nothing to do with the twists. > > Shielded vs non-shielded has to do with the environment, and how much > electrical noise there is near the T1 cable. Nothing more, nothing less. > > > Regarding the Smart Jack it is mostly used as a location at the CPE > > where the Telco can loop and make sure that the problem is at your end. > > So your assumption is correct that you can plug anything you want into > > it, its one your side of the demark, so if it doesn't work it's YOUR > > problem. > > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > -- --- Andrew Latham - AKA: LATHAMA (lay-th-ham-eh) [EMAIL PROTECTED] - [EMAIL PROTECTED] - [EMAIL PROTECTED] If any of the above are down we have bigger problems than my email! Hind sight is most always 20/20 or better. ---
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