maximum voltage tolerance for FXO port 1

[Ali. Ibra]

hello for all engineers and experts in this panasonic forum..!
my quetsion is : what is the maximum DC Volt that can be handled by CO ports in the kx-ns500..?
in other words, when does the DC Voltage became dangerous to put in the CO ports...?
Anyone have any idea..?
Please advise.

 

[Mike_K]

Unfortunately, this information is not in the service manual.
See attached.
Now there is an object on which I have 68 volts on the line.

 

[obtsystems]

Most co lines are 48v dc with 90-110 v ac ringer.

What voltage are you thinking of applying to the port

 

[Ali. Ibra]

Greeting..!
Thanks for all for your response..!
Well i have a kx-ns500 with Defected Co line port on it, when i measure Vrms on it it was 66 V, so it's a kind of normal, but it seems that there is abnormal Voltage came with this Line and cause this harm, So that's why ask. Anyone encounter this situation before..? Do i have to replace the defected Co line port..?

 

[obtsystems]

We had some ports blown due to lightning. If all the ports are in use, you will have to replace the card or send of for repair.

 

[powercom]

 

[powercom]

Hello Ali ,

co lines are 54v dc
Ringing 100-110 v ac
Answer calls 12 v dc
according to impedance lines .