[Asterisk-Users] [OT] Old Building Needs a New Telephone System

[Joe Greco]

> Joe Greco wrote:
> >>Michael Welter wrote:
> >>
> >>>We have a 100 year old building here in Colorado that needs a new 
> >>>telephone system. The building (five floors) is steel frame with lath 
> >>>and plaster walls. There is no crawl space above the ceilings or under 
> >>>the floors.  The building is "historic", and nothing can be done to the 
> >>>exterior.
> >>>
> >>>The current system uses existing Cat3 (two pair) to get to the digital 
> >>>telephone set in each office.  Some offices have an additional pair 
> >>>which is used for fax (and DSL).  I belive this fax line is a POTS line 
> >>>from the telco.
> >>>
> >>>The owners would like to replace the existing telephone system, but they 
> >>>are adamant that the exsiting wiring be reused.  They would like to 
> >>>provide a LAN connection to each office for both data and voice.  (They 
> >>>would also like to install cable TV in each office, but cable install 
> >>>costs would be $80,000+.)
> >>>
> >>>The owners are concerned about frequent power failures and keeping the 
> >>>telephones operational.  Whatever equipemnt and telephone sets we put in 
> >>>the offices will have to be powered from a central UPS (PoE).
> >>>
> >>>So how can I do this?  Can I use RS485 adapters to get ethernet to each 
> >>>office via the two pair?  What kind of data rate can I get with RS485, 
> >>>and would it be half- or full-duplex?  Would wireless work in a steel 
> >>>building? Is there some other technology that can be used?
> >>>
> >>>Ideas, anyone?
> >>
> >>It is real easy. EoV (ethernet over vdsl).
> >>I have done this and it works great.
> >>For every 24 ports I used a 1u EoV, 1u splitter, 1u fxs gateway.
> >>The little termination modems have ethernet and fxs.
> >>Just add an * box, done.
> > 
> > 
> > I was under the impression that none of that stuff ran at 10Mbps or
> > faster speeds.  If he's got two pair and Cat3, he can just run 10Mbps 
> > Ethernet (and full duplex at that, if it's done right).  Or has the
> > short-range DSL stuff (which I know at least one local telco uses for
> > in-house network extension purposes) finally beaten that speed?
> > 
> > ... JG
> 
> 15Mbps symmetrical

Not bad...   that'd let you get 30Mbps out of the same copper for only
a one-time hardware cost (two circuits @ 15Mbps each).

... JG
-- 
Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net
"We call it the 'one bite at the apple' rule. Give me one chance [and] then I
won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN)
With 24 million small businesses in the US alone, that's way too many apples.