John, I would recommend installing both some multimode fiber and single mode fiber. Most cable vendors can provide a single sheathed set of cables that includes both types of fiber. The distance for typical multimode fiber on SX GBICS is at least 220 meters, some Cisco sources will say their optics are better quality and will run 500M. I would stay away from mode conditioning cables if at all possible; they are very difficult to dress up neatly which reduces overall long term reliability. The multimode fiber GBICs are rather inexpensive so you can save some money by using multimode only. In fact, if you really need to save money, don't terminate the single mode because it's very expensive to put the ends on the cable. Save the single mode for 10G in a few years. Once you move into LX GBICs on single mode you can go something like 5k meters away with a minimum distance of 2 meters.
Have fun!! Jeffrey Reed Classic Networking, Inc. Cell 717-805-5536 Office 717-737-8586 FAX 717-737-0290 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Chuck's Long Road Sent: Wednesday, August 14, 2002 7:26 PM To: [EMAIL PROTECTED] Subject: Re: Cabling techniques between 4006 & 2550 [7:51411] 2950 switches? all Cisco GBIC's ( and in fact all GBIC's in general ) are SC connectors. there are such thing as SC-ST patch cables, in case your contractor terminates the fiber as ST. Multimode fiber has a distance limitation of 1800 feet or so. You can use LX GBIC's in conjunction with mode conditioning patch cables at both ends over multimode fiber, and extend that distance quite a bit. Or you can go with single mode. I am not certain, but I "think" I read someplace that single mode fiber on short runs requires an attenuation patch cable at both ends The GBIC's don't care much what kind of fiber you use, but you do need to be aware of the "gotcha's" I don't have the Cisco link hand, but a search on "GBIC" and "distance" should get you to a couple of good guides on CCO. HTH -- coming soon: www.chuckslongroad.info ""John Brandis"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Hi All, > > Am building a new network and have some questions to answer, before I get > cabling quotes. I have placed an order for a Cat 4006 at my core, and some > 20 2550 switch's at my distribution layer. Running a pretty simple network. > > MY question is: > > 1). To run between the 3 floors in my building, what type of fibre would be > best used > > > 2). What type of termination points of the fibre,, are required, so i can > cnonnect to the 4006 and 2550 respectively. > > Thanks all for your answers last night about the VPN. I got it going after > some pre-shared key spelling mistakes, and a bug in the VPN concentrator > software was found. > > John > Sydney, Australia > > > ********************************************************************** > > visit http://www.solution6.com > visit http://www.eccountancy.com - everything for accountants. > > UK Customers - http://www.solution6.co.uk > > ********************************************************************* > This email message (and attachments) may contain information that is > confidential to Solution 6. If you are not the intended recipient you cannot > use, distribute or copy the message or attachments. In such a case, please > notify the sender by return email immediately and erase all copies of the > message and attachments. Opinions, conclusions and other information in > this message and attachments that do not relate to the official business of > Solution 6 are neither given nor endorsed by it. > ********************************************************************* Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=51421&t=51411 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
