On 12/07/2011 04:51 PM, Vieri wrote:
--- On Wed, 12/7/11, Kevin P. Fleming<[email protected]> wrote:
Vieri: You aren't even far enough along to worry about
D-channel assignments or anything like that. Your span is in
RED alarm; that means it can't see the far end at all. Until
you get that cured (layer 1 - physical layer) nothing above
it is going to work.
Since they mentioned HDB3 and CRC4, you most definitely
have an E1 span, and you will need to specify 'CCS' as well
because you are using ISDN signaling. If the line
coding/framing settings are wrong that *could* result in a
RED alarm, but doesn't always.
So, you need to start by getting the span to come out of
RED alarm (to go 'green'). This could be a cabling problem,
a hardware problem, or it could something as simple as the
fact that the telco hasn't actually 'turned up' the span
yet, because they don't usually do that until you have your
equipment plugged in and you call them to tell them that you
are ready for the span to be turned up.
They "should" have turned it up, or at least that's what one of the tech guys
told me.
But I guess I'll have to check with them again.
The cable should be ok (standard ethernet cable) but I didn't actually install
it myself (I'm in a remote location) so I'll have to check that too.
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.
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
--
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