[asterisk-users] ISDN PRI configuration

[Kevin P. Fleming]

On 12/07/2011 05:06 PM, Vieri wrote:
>
>
> --- On Wed, 12/7/11, Kevin P. Fleming<kpfleming at digium.com>  wrote:
>
>> Standard Ethernet cables do not always work for T-1/E-1
>> spans. They do work a rather large percentage of the time,
>> but not always. Distance between the NIU and the T-1/E-1
>> card can be a factor, among other things.
>>
>> Many Digium products include span loopback devices, that
>> you can plug a cable into and generate a hard loopback
>> towards the card. If there is one of those on-site, have
>> someone unplug the cable from the NIU and plug it into the
>> loopback device instead; if the span goes green, then at
>> least your cabling/wiring are OK.
>
> I bought several Digium products and for the site I'm managing now, there are at least these cards:
> Wildcard TE120P single-span T1/E1/J1 card (rev 11)

A loopback connector should have been included with this card. It does 
not appear that our web store makes them (the T10i loopback connectors) 
available as individual items, although some distributors may sell them.

> ISDN controller: Digium, Inc. Wildcard B410 quad-BRI card
> and maybe more but right now I don't recall any "loopback device" although I won't be sure until I go to the site.
> Can a loopback device be bought seperately?
>
> What kind of cable should be used instead of an ethernet cable (I think they used a 5m long cat5 T-568B Straight-Through Ethernet Cable)?

As I said before... an Ethernet cable will work nearly all the time, and 
at a 5m length it's probably fine.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org