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A week or so ago I plugged in one of my 17 phones into the same line that the KSU uses for line 1 but simply not connected to the 1A2, which was a rotary phone, and started to dial a friend, but then the keyset in the office started to ring, so I flashed the hookswitch only to get dial tone. I am assuming the CO ringing voltage cycle is similar or almost identical to Pulse dialing, and that the interrupter was receiving "ringing voltage"?
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Joined: Dec 2005
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RIP Moderator-Mitel, Panasonic
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RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Your assumption is basically correct. 10 pps dialing looks like sorta square wave ringing and once DTMF became prevalent, the telcos weren't too worried about p/d ringer detection. John C.
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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Joined: Sep 2006
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Is it the only one of your many phones that does it?
Arthur P. Bloom
"30 years of faithful service...15 years on hold"
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Joined: Feb 2009
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I have also dialed pulse on other phones with the same outcome.
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Joined: Dec 2005
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RIP Moderator-Mitel, Panasonic
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RIP Moderator-Mitel, Panasonic
Joined: Dec 2005
Posts: 7,056 |
Bobby, I think the R/D pulses fooled the 400 line card in the KSU into believing that 20 Htz ringing was coming in. Reversing bell leads won't fix that. Tho' I suppose it wouldn't hurt to reverse T & R at the CO port in the KSU. More likely, a different model/brand of 400 card might clear the problem. In the end, the wiring is 'wrong' in front of the KSU and the Telco would have walked away back when they took care of the 1A2 systems.
When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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Joined: Feb 2009
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I will switch the KTU and give it a try.
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That did the trick! Thanks! The KTU in the Line 1 slot was an ITT.
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