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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: T1 short-haul vs. long-haul
Actually, it has little to do with the techs day. It's all provisioning. At the local mom and pop CLEC, it actually may be the techs day. YMMV. :) DSX indicates a cross connect in the loop. A cross connect is a dumb mechanical device that does nothing except put access points in the "long haul" circuit so that you can troubleshoot in case of an error or failure. The X connect, depending upon interconnect or full cross connect capability, determines how much test, add, drop, or move capability you have. All the cross connect equipment I am aware of is capable of E1/T1. A smartjack is a dumb device as well, just creating a loop when you disconnect from it which enables the telco to test facing themselves. That's why you want one in your cabinet facing them. If you want to insure you are not a TYPE 2 powered drop from the CO or remote, find out what the CLLI code of providers net is and use that as the Z end when ordering. If they don't have equipment and are going to buy a tail circuit, the last mile, give them someone elses mux CLLI and tell them it's a "preferred provider". The CLLI code is almost always printed/taped/labeled on the front of the device. As far as distance goes, I can cover a 150,000 s/f collocation space from one end to the other with shielded ABAM and wire wrap termination blocks. For this purpose, an ethernet cable should be fine for a long ways. :) You can tweak out the LBO if necessary, but you want to do this only if you have to. Messing with the dB levels could be problematic and should be done in conjuction with the provider. -M -- Martin Hannigan (c) 617-388-2663 VeriSign, Inc. (w) 703-948-7018 Network Engineer IV Operations & Infrastructure [email protected] > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of > Mark Kent > Sent: Wednesday, July 21, 2004 12:40 PM > To: [email protected] > Subject: Re: T1 short-haul vs. long-haul > > > > >> o SmartJack with demarcation point in the office (or same > floor) instead > >> of the building entrance point > > You are not likely going to be able to control that, > it depends on how the install tech's day is going. > Strictly speaking, I believe they are supposed to put > it at the MPOE. > > >> If I am unlucky the T1 gets delivered either directly or > via repeaters as > > You are worrying about this too much. > > Order the T1 (ESF, B8ZS). As you order the circuit specify where you > want it to end up ("server room, 2nd floor") and that you > want an extended > demarc (will cost extra). > > AT install time, make sure someone is around to cajole the installer > into getting the NIU as close as you can to where your router will be. > The installer should test from the extended demarc (make sure > they do). > > Get a standard built-in T1 dsu like as been mentioned in > previous posts. > Plug it into the extended demarc with an ethernet patch cable. > > Now, even though I say to not worry, it is important to remember the > #1 lesson when dealing with telephone companies. I figure it is the > same all over the world, but just in case it isn't, I'll > repeat it here: > > The telco is not your friend. > > -mark >
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