[asterisk-users] t1 cards

[Jeff LaCoursiere]

I would say miles.  DSL limits for equiv bandwidth is around 3 miles if I
recall correctly.

j

On Fri, 3 Oct 2008, Eric Fort wrote:

> without any other hardware than 2 bare ass pci based t1/e1 cards wired back
> to back how far can one go between them?  additional hardware defeats the
> purpose.
>
> Eric
>
> On Fri, Oct 3, 2008 at 3:01 AM, Gordon Henderson
> <gordon+asterisk at drogon.net<gordon%2Basterisk at drogon.net>
> > wrote:
>
> > On Fri, 3 Oct 2008, Eric Fort wrote:
> >
> >  yes, more than 300 meters (longer than copper based ethernet allows).  Yes
> >> to E1, as I understand it, it's just a config change on many cards anyway.
> >> I'm specificly looking at pci based t1/e1 cards because I'm finding single
> >> port cards on ebay going for 100-200 usd.  in some cases I may want to
> >> drive
> >> a channel bank at the far end, thus t1/e1.  anyone have experience on how
> >> far these pci based cards will drive when wired back to back?
> >>
> >
> > Looks like this is the thing then:
> >
> >  http://www.blackbox.com/Catalog/Detail.aspx?cid=381,1452,1468&mid=5362
> >
> > Just over $1000 a pair...
> >
> > couple that with an OpenVox PRI card at one end, channel bank at the other,
> > and off you go...
> >
> > Gordon
> >
> >
> >
> >> Eric
> >>
> >> On Thu, Oct 2, 2008 at 11:34 PM, Gordon Henderson <
> >> gordon+asterisk at drogon.net <gordon%2Basterisk at drogon.net> <
> >> gordon%2Basterisk at drogon.net <gordon%252Basterisk at drogon.net>>> wrote:
> >>
> >>  On Thu, 2 Oct 2008, Eric Fort wrote:
> >>>
> >>>  I presently need to connect a few channels of voice and data between
> >>>
> >>>> multiple locations where I own the copper between them.  Each location
> >>>> exceeds 300M from any other location.  I'm thinking of generating T1's
> >>>> and
> >>>> running those between locations.  If I use PC based cards wired back to
> >>>> back
> >>>> (I can do that, right?) what kind of distance can I expect to be able to
> >>>> span without needing repeaters?  What inexpensive cards can you
> >>>> recommend
> >>>> for use with asterisk?  I'm considering either digium or sangoma.  Would
> >>>> I
> >>>> get any better performance if I used a sync-serial card connected to a
> >>>> separate csu/dsu?
> >>>>
> >>>>
> >>> 300 metres, right? (not 300 miles?)
> >>>
> >>> Why stop at T1? Go for E1 :) with the right kit at each end you ought to
> >>> be
> >>> able to get 2Mb/sec or more. (distance depending)
> >>>
> >>> Personally, I'd go for a technology that gave me Ethernet at each end -
> >>> then it makes it much easier to mix voice and data - But using something
> >>> like a sync. modem and line driver then you need a media converter of
> >>> some
> >>> sorts at each end which might bump up the cost - at the savings of the E1
> >>> card in the PC though. Last time I had bare copper to play with (a BT
> >>> EPS8
> >>> circuit) I had a 2Mb modem at each end going into a Cisco 2600 which was
> >>> running CHDLC over the link and acting as nothing more than a dumb media
> >>> converter to give me Ethernet at each end. This was 6 years ago though.
> >>>
> >>> Ah, Looks like the technology has improved somewhat:
> >>>
> >>>  http://www.blackbox.com/Catalog/Detail.aspx?cid=381,1452,1468&mid=5261
> >>>
> >>> From the UK site:
> >>>
> >>> Or even:
> >>>
> >>>  http://www.blackbox.com/Catalog/Detail.aspx?cid=425,1423,1424&mid=4946
> >>>
> >>> (same thing from the UK site:)
> >>>
> >>>
> >>>
> >>> http://www.blackbox.co.uk/solutions/display.asp?cs=dvh&id=1&doc=lb300a-r2&tx=LAN&sx=Network%20Appliances
> >>>
> >>> You need a pair, obviously...
> >>>
> >>> Hm. US site is $305, UK £253. Rip-off Britain again by the looks of
> >>> it....
> >>>
> >>> As for inexpensive cards - OpenVox. Their E1 cards seem to work OK, but
> >>> if
> >>> using a LAN extender, then they're not neeed at all...
> >>>
> >>> Gordon
> >>>
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