[VoIP] WE 2500 question

[John Novack]

The IAXy also has a fairly low voltage power supply, 6 VDC/ At least the 
one laying on my desk does.
I would bet that the loop current through the IAXy and the 2500 set 
aren't enough to keep the TT osc. going
This assumes that the polarity of the line to the phone is correct.

John Novack


Jayson Smith wrote:
> Hi,
> Unfortunately, being blind, I'm not in a good position to measure those
> voltages. I just tried several phone cords, including the one shipped with
> the phone, on my unused BPA-410. None worked. I like the phone, it's exactly
> what I wanted, I just wish it'd work on my IAXy!
> Jayson.
>
> ----- Original Message ----- 
> From: "Martin Harriss" <martin at Princeton.EDU>
> To: "Jayson Smith" <ratguy at bellsouth.net>; "Voice Over IP Tandem for Analog
> Switches" <voip at ckts.info>
> Sent: Wednesday, March 14, 2007 3:05 PM
> Subject: Re: [VoIP] WE 2500 question
>
>
>   
>> Jayson Smith wrote:
>>     
>>> Hello,
>>> So is this saying, I'd need to somehow get a phone cord with some wires
>>> reversed?  I'll try the phone cord that came with the thing. For those
>>> curious people among you, here's a recording of what I'm getting.
>>> http://www.bluegrasspals.com/2500.wav
>>> Jayson.
>>>       
>> Jayson,
>>
>> Are you in a position to measure the off-hook and on-hook voltage for
>> this phone/ATA combination?  (Or have someone else do it for you?)  It
>> would also be interesting to measure the off-hook voltage both with and
>> without one of the dial keys pressed.  I wonder if the ATA is putting
>> out enough voltage (especially when the phone is off-hook) to run the
>> dial pad.
>>
>> I seem to recall that when you pressed a key on those old dial pads the
>> switch contacts somehow generated an electronic "kick" (for want of a
>> better word) to start the oscillator, which then kept going of its own
>> accord.  I wonder if what you are hearing is this "kick" starting the
>> oscillator for a few cycles, but then the line voltage is not sufficient
>> to keep the oscillator running.
>>
>> Martin
>>
>>     
>
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