> 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. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users