Peter,
3) Which routers should be used. The options are 3com NB-II's DPE+
(dual CPU), Cisco 7200 series, or Cisco 7500 (each router will
have at least two 100Base-T LAN ports).
If you are going to use Cisco which is a good choice, do not go cheap and
get a 7200 for the job. A 7200 can only handle three fast ethernet ports.
I would look at the 7500 series or possibly there gigabit router series.
That will give you enough muscle to handle the job. I would call in your
local Cisco office to check out which model is most appropriate.
1) Bell Atlantic assures us that, because of the redundancy, we can
expect 100% uptime from the OC-12. I would like feedback as to
whether this is a realistic portrayal of the SONET environment.
Nobody gets 100% uptime from anything. Can't happen!
2) We have the option of using either single-mode or multi-mode fiber
OC-3 connections - what factors should be considered in selecting
the fiber media type.
Look at the distance, I believe multi mode is only good for a couple of
miles, then you have to go single mode, which will drive your costs up.
I hope this helps!
Dave Greer
Senior Telecomm Analyst