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?
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@ifax.com +1.215.438.4638 +1.215.243.8335 (fax) ----- Original Message ----- From: "George Pajari" <George.Pajari@netVOICE.ca> To: <Asterisk-users@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 resetthe> T100P. > > The channel bank has three status lights: T1, Framing, Status. T1 isgreen,> 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 greenbut> 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 clockswitch> on the channel bank as I have tried all four combinations without obvious > consistent affect? > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
On Sunday 20 June 2004 17:51, George Pajari wrote:> The zaptel configuration is: > span=1,0,0,esf,b8zsClock from the channel bank. 1,1,0> 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 differenceSet the AB1 clock source to on. Not sure about the CSU; I don't recall having that jumper setting on my AB1.> The remaining possibilities are: > a) a bad channel bank (although it passes the self test) > b) a bad zaptel configurationIf you plug in a T1 loopback cable into the T100P does it go green? It should, regardless of clock setting. Similarly if you plug a T1 loopback cable into the AB1 it should go green too. T1 loopback cable: 1&4, 2&5.> 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?The T100P framer can take timing from the incoming T1 or time to an internal 8kHz clock. This sets where the T100P attempts to get its clock source from. 0 means the framer takes its clock from the internal 8kHz clock; 1 means that the framer tries to lock on to the incoming T1. Typically you want *1* thing providing clock and everything else trying to sync to it. With a T100P it's a no brainer; if the other end is pretty much any kind of telco gear capable of generating clock, use it instead of the internal source. :-) Regards, Andrew