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Cell2Tel Bluetooth RJ11 gateway

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Dan Lanciani

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Jun 11, 2009, 5:25:41 PM6/11/09
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Has anyone had any experience with this? I recently bought one and
connected a 2500 set. Polarity was wrong but I guess nobody worries
about that anymore. Ring test actually made the bell sound which
seemed encouraging. Unfortunately, while it worked for outgoing calls
it seemed to lose its association with my cell phone when an incoming
call arrived. It turned out that what was actually happening was that
the Cell2Tel was trying to ring the 2500 set and crashing/rebooting in
the attempt. If I disconnect the ringer I can answer blind just fine.

I retried the original ring test and it no longer works; the device
again crashes in the attempt. I conclude that the ring voltage
generator can't deal with a real load and/or was damaged. When
it tries to drive the bell it loads the power supply and causes
the cpu to reset. (I tried a different wall wart in case it was
that simple but no luck.) Customer support isn't very helpful,
not responding as to whether they have ever tested with a real
mechanical ringer. I can send the unit in for them to "look at"
but I have a feeling it might just be a waste of postage (not
to mention making it impossible to return to the place of purchase).

Dan Lanciani
ddl@danlan.*com

msg

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Jun 12, 2009, 12:52:09 AM6/12/09
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Dan Lanciani wrote:

FWIW, I tried ringing a 500 set on a Linksys PAP2; it doesn't ring
but at least the ATA didn't crash ;)

Surprisingly, there doesn't seem to be ringer equiv. data for a lot
of these accessories.

Michael

Dan Lanciani

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Jun 12, 2009, 1:26:12 AM6/12/09
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Indeed, even the FXS ports on my Cisco (I've tried NM-HDA, VIC-4FXS/DID,
and VIC2-2FXS) will not ring a 2500 set. I think the main problem is that
the lowest supported ring frequency is 25Hz--at least on 3600 series routers.
An SPA-3000, on the other hand, did work after I lowered the frequency to
20Hz from the 25Hz default. (Raising the voltage also worked though less
well.) I wonder why 25Hz is so common.

Dan Lanciani
ddl@danlan.*com

Reed

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Jun 12, 2009, 10:29:02 PM6/12/09
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I wonder if a 2500 needs more *voltage* than ATAs, routers, etc can
provide ??
Some interesting reading here re issues with ringing freq, volts, and
waveforms even
http://www.sandman.com/ringvoltbul.html

Dan Lanciani

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Jun 12, 2009, 11:10:10 PM6/12/09
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At 25Hz the sample I was using needed ~120v to ring, so in a sense, yes.
At 20Hz the phone is happy with ~80v.

Dan Lanciani
ddl@danlan.*com

Terry

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Jun 15, 2009, 10:39:05 AM6/15/09
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"Dan Lanciani" <ddl@danlan.*com> wrote in message
news:135...@news1.IPSWITCHS.CMM...

The 2500 ringer is tuned to 20hz.


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