Diverse Entrance Redundancy
Private
Networks for Medical, VoIP, and Banking
Reliability
of data and VoIP telephone networks today is absolutely vital. So much so
that companies often spend outrageous sums to insure that their phone calls
and e-mails can go through. But any network requires physical connectivity that is
implemented one of four ways. Three of them: copper wire (Telco), coax cable
(Cable Companies), and major carrier fiber (LEC, CLEC, Cable) all come up
from the ground. Even when fiber sonnet rings are used, a expensive model
of reliability, this still does not protect you from floods, human error,
fire, orearthquakes cutting lines.
Reliability
of data and VoIP telephone networks today is absolutely vital. So much so
that companies often spend outrageous sums to insure that their phone calls
and e-mails can go through. Only wireless delivery gives you a true alternate entrance
path to your building or site. So if you are really serious about protecting
your communications speak to CTC about how our WiMAX and proprietary fixed
microwave solutions can protect you and keep your communications going.
Because of our relationship with the KC
NAP we can often automate the failover process, including support for
BGP routing. We also fully support for the Cisco Dual Wan routers that will
automatically keep you going.
CTC Wireless is a division of Computers & Tele-Comm,
Inc., a full service ISP and Data Center Company, and we do supply hard wired
T-1s from a variety of CLEC partners. In fact, we have developed a solution
with Avid Communications that will
insure your communications work with 99.999% reliability and diverse entrance
support by ether wired or wireless connectivity.
Since all customers don't need this level of redundancy
it is an optional service, but one we take advantage of ourselves, as all
of our primary transmitter points are at least dual fed.
CTC can also arrange to feed your location from two different
transmitter sites that offer additional redundancy from a single vendor without
having to pay the LEC (local exchange carrier) for local loops. More information
on redundancy planning can be found at: http://www.ctcco.com/Services_Redundant.php
including a white paper with deep detail on the subject.
Since planning a complete failover solution is a complex
process that may involve many vendors, we urge interested parties to consult
one of our sales engineers in planning your requirements. Our VP of Sales
Larry Levin would be happy to answer questions about diverse networks, VPNs
and fail over options.
More information on route
diversity:
Route diversity is generally defined as the communications routing between two points over more than one geographic or physical path with no common points. 2 For a protected customer, this means that the connectivity between the customer and the local central office (specifically to the selective routers) should have alternative ways and/or means. It also means that there are no common points of connection along the way with the exception potentially at the end points (the PSTN selective router and the Private Branch Exchange or connection main frame). Strictly speaking, the alternative means may be achieved by completely distinct methods such as copper wireline, fiber optic cable, free space optical or other radio links, or even satellite link. The point is that in order to provide diversity, connections between the customer and the central offices should be by separate and distinct methods with no common points of connection along the way.
By providing separate and distinct routing methods, it is also implied that there are separate and distinct entry points for each transmission means as they terminate at the end points. In many instances, this means that the separate routes should enter/leave from distinct and separated entry points to the end point facilities. For example, typical route diverse wireline systems enter at separate wiring closets or entrance facilities that support either the central office or the customer site. It should be noted that route diversity is NOT satisfied by two separate systems that follow a similar geographic path, for example parallel cable systems. Under such circumstances, both means are still vulnerable to outage as if they were a similar single path.
In addition, redundant paths that employ the same transmission means (e.g. two trunks that are on the same cable or two channels on the same radio system) also do not satisfy proper diversity requirements. This condition is particularly important when either economic considerations or simple geographic conditions dictate path routing. As discussed the costs of diversity must be considered in the overall vulnerability assessment of the facility and the need for route diversity.