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Re: (ASCEND) o's in PRI display



At 01:56 PM 6/11/97 -0700, Jon Rust wrote:
>>The o character represents a channel that is 'out of service'.
>>You may want to talk to your telco to troubleshoot since in
>>most cases an out of service channel is forced out from the
>>telco side.  The other part is that you have taken the channels
>>out of service in your T1 configuration (Net/T1).
>
>Not entirely true. Yes, the o's mean out of service. No, it is not always
>the telco. Not even usually (for me anyway). On my 400, a quick reboot
>(either a quick power cycle, or from a system reset) will leave the entire
>PRI o'ed out. My p400 likes to reset itself every now and then for now
>apparent reason. Lots o' fun (pun intended).
>
>Physically disconnecting the PRI, waiting a few seconds, and reconnecting
>it fixes it every time.

AHA, big clue there!

Does this work 100% every time, and the o's problem is also 100% reproducible 
when only power-cycling ?

.....if memory serves me correctly, the P400 will do a T1 loop-back towards
the CO when power-cycled. When it recovers, and "cut's through" again, it
starts to look for the D-channel to be re-started (various different terms
used here dependent on the switch), and puts the channels in the "o" state,
waiting for that initialization...

The network in the meantime *never* saw the PRI go down because of the
power-cycle loop-back, so continues to process calls as if nothing had
happened. So, since the CO *never* sends the "restart" to the P400, the 
channels stay in the "o" state....our software however figures that if
a call is presented, we should still answer it - the network must know
best ;)...and those channels will go back "in service" as a result. The 
rest still stay in the "o" state waiting for that "restart", or a "wake-up"
call...

Does this appear to match what we are seeing here ?



Kevin

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