The only GBIC that doesn't care whether or not you use MM or SM is the LX/LH GBIC. There are two other types that might benifit your situation. The SX GBIC is cheaper and is only compatabile w/ MM. I have seen instances where I've caught link off of SM but only from a 3 meter patch cord. The distance limitation of SX GBIC's is relevant to what micron core you have and the modal frequencies of the fiber. The range of 62.5 micron and 160 MHz/km frequency is 722 ft (220 m) and 50.0 micron and 500 MHz/km freq is 1804 ft (550 m). Also there is the ZX model which is the nicest, it uses SM and can shoot up to 62.1 miles (100 km). Depending on the size of the building I would recommend using the SX cards. In most cases everything across the board is cheaper, and (although I'm unsure of your situation) there doesn't seem to be the need for the greater distance features of the other cards. Hope this helps.
Steve Jarvis -----Original Message----- From: Chuck's Long Road [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 8:26 AM 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=51424&t=51411 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
