[Asterisk-Users] Channel Bank Frustrations

[Darren Nickerson]

George,

We have this config working. Please give me a call (yeah, I'm at the office
too) and we can walk through your config together.

-Darren

--
Darren Nickerson
Senior Sales & Support Engineer
iFax Solutions, Inc. www.ifax.com
darren.nickerson at ifax.com
+1.215.438.4638
+1.215.243.8335 (fax)

----- Original Message ----- 
From: "George Pajari" <George.Pajari at netVOICE.ca>
To: <Asterisk-users at lists.digium.com>
Sent: Sunday, June 20, 2004 5:51 PM
Subject: [Asterisk-Users] Channel Bank Frustrations


> I'm trying to get a Carrier Access Corp. Channel Bank I working with a
> Digium T100P without success.
>
> What is stranger is that the status lights on the channel bank and T100P
> seem to change almost each time I power cycle the channel bank or reset
the
> T100P.
>
> The channel bank has three status lights: T1, Framing, Status. T1 is
green,
> Status is yellow, and Framing is usually red but sometime green.
>
> The T100P is sometimes red, sometimes green.
>
> The zaptel configuration is:
>     span=1,0,0,esf,b8zs
>
> The channel bank settings are:
>     Clock source: On or Off, seems not to make a difference
>     Framing: ESF
>     Line Code: B8ZS
>     CSU: On or Off, seems not to make a difference
>
> Once I managed to get all three status lights on the channel bank green
but
> the T100P was red.
>
> On the few cases the T100P gives a green status, zttool shows the RxB bits
> randomly flipping one and off.
>
> I have tried different T100P cards in different servers so that has been
> eliminated as a cause.
>
> I have made up several T1 loopback cables so I don't think it is a flaky
> cable.
>
> The remaining possibilities are:
>  a) a bad channel bank (although it passes the self test)
>  b) a bad zaptel configuration
>
> After several hours of trying different settings and DIP switches I am
> increasingly frustrated in trying to determine the cause of the problem.
It
> has been especially difficult since power cycling the channel bank can
> result in a change to the status lights without any change to the settings
> or configuration.
>
> Any suggestions on what might be causing the problem or what to try next?
> We're trying to go live this week and this problem is critical.
>
> Thanks for any help/suggestions
>
> g.
>
> P.S. - What, exactly, is the meaning of the second argument to the zaptel
> span parameter ("timing source") and how does it relate to the clock
switch
> on the channel bank as I have tried all four combinations without obvious
> consistent affect?
>
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