[Asterisk-Users] Fun new problem with Aastra 390 ADSI phones

[TC]

Bill
I have adtran750 with Vista/Aastra 350, 390, & 480's never seen that one
tim
-----Original Message-----
From: asterisk at billheckel.com <asterisk at billheckel.com>
To: asterisk-users at lists.digium.com <asterisk-users at lists.digium.com>
Date: February 21, 2003 12:52 PM
Subject: [Asterisk-Users] Fun new problem with Aastra 390 ADSI phones


>I seem to have discovered a problem with the Aastra 390 phones or possibly
with the channel banks I
>am using, Carrier Access Access bank 1s.
>
>Users were complaining that when they answered an inbound call, sometimes
the phone would buzz and
>go dead on them.
>
>I tried playing with it a bit to see what might cause it and found that if
a user answers during the
>ring, the phone goes haywire, buzzes, screen flashes, gets ugly.  The
calling party hears an answer,
>ringing stops but no connection.  After a time or 2, the phone won't work
at all on inbound calls
>and has to be replaced.
>
>How quickly after off hook should an FXO device drop ring voltage to normal
line voltage?  It might
>possibly be this but I really don't think these CAC banks would be that far
out of spec.
>
>Has anybody else seen this or do I have a bad batch?
>
>Bill
>
>
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