🚀 go-pugleaf

From: snorthc@nswc.navy.mil (Stephen Northcutt)
Subject: 5 kilometer span

   I work for a fairly large campus.  The buildings are connected to
   12' x 24' concrete shacks we call comsheds.  The comsheds terminate
   2 1/2" multi tube duct which gets filled with various appropriate
   media.  The duct goes from com shed to com shed.  To date the inter
   com shed distance has not exceeded 1500'.  We are about to span
   5 kilometers to reach an in-the-boonies section of the campus.
   
   We think we want to span this distance using single mode fiber.  To
   that end we have ordered a six fiber bundle.  Now the question is
   what to stick on the ends of the fiber :-)
   
   One engineering approach would be to implement FDDI over singlemode.
   We have FDDI capable routers, what do we need to use FDDI over
   singlemode?

If you are using a Cisco AGS+ router, you can substitute your APP-LMM
(Multimode/Multimode) appliques with APP-LSS (Singlemode/Singlemode)
appliques to attach them to a singlemode ring. You can also transition
between the two types of FDDI cabling with APP-LMS (Multimode/Singlemode)
and APP-LSM (Singlemode/Multimode) appliques. These four appliques should
allow your routers to transition between cabling types as necessary.

If you have not yet installed any FDDI cards or appliques in your router,
please feel free to contact me directly, and I can give you some more
details.

At your service!

-Peter Corless.
 Cisco Customer Service
 US Federal Region Representative
 --------------------------------
 e-mail: pcorless@cisco.com
 phone:  (415) 903-8723
 fax:    (415) 903-8080