[BC] Telos one + one problem

[JYRussell@academicplanet.com]

I've seen this same sort of "hang on problem" occur on my 1X6... one channel
wouldn't act right.  Seemed to "latch into' one state or another... either
"on" or "off"... no matter what the display showed....  all the rest acted
ok.

  I don't really know if it matters what the return audio is, though I
suppose you could also check there's no weirdness coming into that port by
using a jumpered cable stuffed in just to plug it into perfect silence... I
guess you'd want a cap across an otherwise open piece of line.
I would think a whole bunch of RF or static getting in there would make a
Telos a bit nutty
and don't know where your unit is sitting.

Our unit will handle the null stuff for us, I never have tried it with no
return... seems like it ought to work but, the durned thing wants to have
it's null twiddled...

Further for the heck of it... in our case, it was a matter of stuffing a new
chip in as the old one had been zorched by a lightning hit.   I can't
remember the exact details, but another idea might be to start by looking at
all the stuff involved in draining off RF and such from the unit... thinking
that a bit of static hanging around might be confusing the chip a bit.
Squeak all the chips down.  Co you have torroids over the incoming phone
line (s) ? If this were my old unit, and I knew all the basics were done
right... I 'd have an odds-on bet one of the two chips for that particular
channel was shot.  But then I run it with return audio, too...

Jason

----- Original Message -----
From: "Mark Bulla" <mbulla at wnuv.sbgnet.com>
To: <broadcast at radiolists.net>
Sent: Wednesday, December 21, 2005 7:19 AM
Subject: [BC] Telos one + one problem


> Hi all-
>       I've had a Telos One + One hybrid sitting on my shelf for about
> two years - it was purchased as part of our studio upgrade, but never
> installed.  Anyhow, we decided to use it for our closed captioning
> system, so I put it in last week.  It's connected to a direct phone line
> (that is, it doesn't go through the building phone system), and has
> audio coming from the audio board (I'm not currently using the return
> audio).  The unit has the basic auto-answer boards installed.
>       Since I put it in, I've had a couple of odd problems with it.
> Sometimes it won't hang up.  On other occasions, it will look like it
> connects to the phone line, but there won't be any indication of audio
> from the audio board on the LEDs on the front of the unit, and the
> caller won't hear anything.  Hanging up and calling back will NOT
> resolve the issue.
>       I've talked to the Telos guy a few times, and he told me that the
> hang-up issue can be caused by the voltage on the phone line not
> dropping all the way, thus causing it to hang on.  He sounds baffled
> about the audio issue, and says that he's never heard of that problem
> before.  Since I found some references to the same problem in the
> crtech.org archives, and both units in the one + one do the same thing,
> I expect that it's a pretty common problem, though.
>
> Does anyone have any long term fixes for this?
>
> Thanks!
>
> Mark
> --
> Mark D. Bulla - Chief Engineer
> WNUV WB-54
> 2000 W 41st Street
> Baltimore, MD  21211
> t: 410-467-8854
> f: 410-662-4886
>
>
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