atcomsystems.ca/forum Forums TDM Business Telephone Systems Panasonic Telephones & Systems 824 jack port connected to CO port

I am helping a customer with their gate phone. It is a DoorKing connected to a Panasonic phone system. The gate-phone has been doing weird things - sometimes it will auto-answer and open the gate and sometimes the line will busy-out entirely so no calls can come from gate. I did not do the install and am only somewhat familiar with Panasonic. This was installed a decade or so ago and the old vendor is not available.

Long-story-short; after much troubleshooting and tone-and-tracing, the gate phone is wired so that dial-tone is fed from from jack 18 and is looped back from the gate-phone(s) on a separate pair and goes to CO3.

We did not have the system password and so I reset the system, which seems to have fixed another bad port, and the one to the gate is no longer doing the odd things, and I am able to program it as a ring-down so that it rings an extension on the system; but how do I get it to ring all phones?

If the door unit id wired to co 3 and sends ring voltage to CO 3 then set co 3 to ring all extensions on incoming calls.

If the door unit calls the extension that is looped to co 3, same thing, program co 3 to ring all extensions

I don't understand why this works/doesn't work - if I test with a standard phone instead of the doorking, it doesn't ring all phones, but when wired up with the DoorKing it does, so I guess Doorking is generating the ring...?

Anyway, it rings in all the phones, but only rings 1 time before the line seems to auto-answer and somehow sends a "9" (we hear a tone and the gate opens). Trying to extend the ring time and not have it auto answer, but now idea how or what is picking up the line.

If you put a phone on the cable from the doorking. Do you get dial tone. And when you call from the door king does it ring the phone.

If you also loop another extension from the system to line 3 and ring that extension what happens. Unless you have programmed a pickup on the extension that dials a code the door king is doing it.

What is the setup on the system. Is the door king connected to co 3 or to an extension
If an extension. Is there a different extension connection to co 3?

Here are my notes and wiring diagram:





DoorKing1


DoorKing2


terminals (same for both)


Panasonic - it's jumbled, but the brown pair to jack 18 and the blue-pair to CO3 from the same cable can be seen

Yes - I did not do this yesterday but did on my first visit a couple of months ago. If I remove the 'Phone In' feed and connect my butt-set to 'Phone Out', then do a test from the gate-phone, it will ring my butt-set and I can open the gate, and it does not auto-answer or open on it's own.

Yes, The DoorKing has to be generating the call/ring-voltage. I tried patching in my butt-set to the circuit and going off-hook and it did not initiate a call; I then configured port 18 to ringdown to port 17, and when I went off-hook again, only ext 17 rang, nothing came in on CO3.

Nothing special set up on phone system, just default settings. Port 18 is the only extension involved, as far as I can tell.

Does the 824 have a Panasonic voice processing system connected? The reason I ask is that you say you initialized the 824 due to lack of password. In doing so, this makes all lines ring on all station ports. In addition, the system will automatically detect a Panasonic voice processing system, so it will answer as auto attendant on the first ring. The 824 will also send #9 upon disconnect in order to "tell" the auto attendant that the calling party has hung up. Since you mentioned 9 being the code to open the gate, my mind has started wandering due to the coincidence that exists.

<Something> is answering on the first ring and <something> is dialing 9. Sounds like I may be onto something.

Step 1: If there is a voice processing unit, disconnect it from the 824 and test again with all Door King connections intact.
Step 2: If things work properly, leave it disconnected until we can dig deeper into assisting you with station ring programming.

There is no voice processing system connected and similar symptoms existed before I defaulted the system - it would auto-answer and open the gate randomly.

I'm wondering if looping the jack-port back to the CO port could cause some problem? Since the Doorking is sending the call with or without the jack port connected; but the call doesn't ring CO3 unless the jack port is connected; could the jack port be connected just for dial-tone? Could that be why he CO port doesn't 'hear' the Doorking call unless the jack port is connected? The CO port needs to detect loop current to be 'listening' on the CO port?