[VoIP] Initial deposit required recording

[Steph Kerman]

Mark Rudholm wrote:
> Steph Kerman wrote:
>> Mark Rudholm wrote:
>>> Something I've noticed with my D phones is that they mute the coin 
>>> tones much more than my C phones.
>> I noticed recently that the coin maintenance practice specifically 
>> says the Ds mute completely and the Cs not.
> If you're in a quiet place, you can hear the coin tones on a D set, 
> but just barely. I assume it's unintentional (like the slight amount 
> of pulse clicking you can hear on most rotary phones despite the 
> receiver being "muted").
Funny you should mention that.  An original 500 set equipped with a #7 
dial mutes the dial pulses to the point of inaudibility.  The change to 
the #9 dial made them audible.  I noticed it on the very first #9 dial I 
acquired.  Apparently the difference is due to the reduction from a 20 
or 22 gauge lead to what is probably 26 gauge.  Even though it's only 8" 
of wire, it seems to matter.  The only other possible explanation is the 
choice of contact material.  I greatly doubt that changed.
> If you know of a way to change the "muting" to something more like the 
> attenuation applied by touch-tone dials when sending DTMF signals, I'd 
> be interested. Presumably there's a switch opening somewhere in the 
> phone that could be defeated with a jumper or resistor (non-permanently).
Alas, I have never seen a real schematic of a 1D and since I don't own 
one, could not reverse engineer it even if I was feeling motivated.  
Assuming the handset receiver leads connect directly to the network 
through the TT dial, it stands to reason that the tones are muted by 
shunting.  One would have to identify the lead it uses to shunt the 
receiver and place a small resistor in series.  If however the receiver 
circuit passes through the totalizer IC, I'd say your SOL.
>>> There are some other minor differences. For example, if you put a 
>>> coin into a C phone while it is on-hook, the phone will pause and 
>>> then return it. If you do that on a D phone, the coin will sit on 
>>> the hopper until you go off-hook and then on-hook.
>> That's interesting. Never noticed. I have C and E sets but haven't 
>> played with them much. I'd like to have an A too but so far don't.
> I'd like to have an un-modified three-slot. Unfortunately, those don't 
> seem to exist anymore.
Sure they do.  They appear on eBay but with much less frequency and at 
higher prices.  It's also harder identify the auctions of interest due 
to all the Chinese made bogus 3-slots that are listed there day in and 
day out.  But even the ones like this: 
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320150357709&ssPageName=ADME:B:SS:US:1
can probably be made whole again.  Internal parts are around.

Steph
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