Matt,
We have not considered that, but it comes down to cost as well. We
charge a $500 setup fee to get the fiber installed at the customer prem.
It costs us about $1,000 to actually get the fiber installed including
the Cisco switch with GBIC's. I understand the idea of CWDM and ADMs,
but at the same time I see a downside. If one of the GBIC modules fails
at the customer prem, they are down. With our current configuration,
they would still be up and running. It would also add one more point of
failure at each customer.
We adopted the KISS (keep it simple stupid) principle when we started
doing the fiber. We run STP on the main switch at our NOC, so really
traffic only goes out one GBIC at our NOC unless there is a problem. At
that point, we get email notification and using our SNMP system, we can
tell exactly where the problem is and get it fixed quickly. Right now we
are only moving about 50Mbps of traffic, so even only having 1Gbps of
capacity should work for many, many years to come.
Travis
Microserv
Matt Liotta wrote:
Travis Johnson wrote:
Hi,
This is very true... we install a small UPS along with the switch to
help with power issues... but with 70+ customers on the ring right
now, we have not seen any issues. If a single customer goes down, the
ring is still fully functional for everyone else. At that point, we
contact that customer to find out the problem and get it resolved as
quickly as possible. The only time we have had more than 1 customer
down at a time is when a major power outage happens that lasts more
than an hour.
Since you are using GBICs have you considered using CWDM along with
passive ADMs instead? Passive ADMs don't require any power and could
be used at each customer location to drop a single channel of light
that you plug into the GBIC. This way if a single customer's equipment
goes down the rest of the ring stays up. With CWDM you only have 8
channels of light giving you a max of 8 gigs shared across your ring,
but that is probably fine considering you only have 2 gigs with your
current setup.
-Matt
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