> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:asterisk-users- > [EMAIL PROTECTED] On Behalf Of Kevin P. Fleming > Sent: Monday, April 24, 2006 12:14 PM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: Re: Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] > whatcable to connect a legacy PBX to a TE410P ?" > > Rich Adamson wrote: > > > Oh, and if shielded T1 cable is used, the shield at each end of the > > cable must be grounded. (Let's see how many can figure out how to do > > that via an rj45 plug. ;) > > You use shielded plugs and jacks, of course :-) That is why the > TE405P/TE410P have shielded jacks (as of about a year ago, IIRC). The > retail packaged cards even ship with four shielded cables included! > > Minor point: isn't it safer to only ground the shield on one end? > _______________________________________________ If you want to fry your cards attach both sides to ground, I don't know about the engineering specs but 'floating' one side has always eliminated ground-loops, and the possibility of lightning damaging the cards. As a rule I always ground the side furthest from my equipment as I want the lightning to go that-a-way!!!
Electricity is lazy by nature and always tries to find the shortest (least resistive) path to ground. I make sure that my CPE uphill for the spike.. _______________________________________________ --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
