[asterisk-users] t1 cards

[Eric Fort]

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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