Well
In Pennsylvania Verizon The ring freq consists of 5 tones
to handle 5 party lines and or 10 party reverse side ringing
( No more ,,,not sure if we have any other than 2 party lines )
16, 25, 33, 50 ,66 cycles was the frequency. When it was Step X Step
mechanical the ring generators were 100 watt motor driven
today they use 25 watt generators and can divide the load between
many generators. Because of timed ringing schemes the small generator
could handle many 1000s of phone ringing,
All I can think of that used 1000 Hz modulated at 10/20 cycles was pre in
band
signaling that used a tone like this to disconnect the far end of a trunk
ckt.
that was up for testing. I have a nice chrome plated whistle that was
blown into
the receiver and produces 1000 Hz at a 10/20 cycle modulated rate
the only standard is what the telco started out with 100 Years ago
Nice string even if off topic
Bob K3DJC
On Thu, 8 Nov 2001 19:06:19 -0500 "John Andrews" <[email protected]>
writes:
----- Original Message -----
From: Larry Kayser <[email protected]>
To: <[email protected]>
Sent: Thursday, November 08, 2001 5:57 PM
Subject: Re: LF: Re: Ringing Voltage on Telephone , boo-boo
Have you actually looked?
Yessir... I'm in the telcom equipment business. I'm not claiming that
you're
wrong, Larry... just that the normal U.S. ringing signal is plain old
20 Hz
AC.
John Andrews, W1TAG (Comrex Corp.)
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