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

[Bob Knight]

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

-- 
Bob Knight
[-w] the work option
bk at minusw.com
925-449-9163