I use the 3CX Phone from a remote site and everything works fine except one think. After the hung up, the line is still open. I use patton 4552 and I can see the line Led to blink. Is there any solution?
Had this problem with an FXO gateway, not sure if the T1 gateways have similar settings but ensure "Loop-Break" is enabled in your T1 disconnect Settings.
Try and find the correct Disconnection Tone for your Gateway here: http://www.3amsystems.com/
Configure it correctly and it will disconnect calls correctly.
You can go in your Patton's settings and find a setting that either says: "Busy Tone" or "Disconnection Tone" and paste the Tone there. It might need some Re-Arranging because for some models the tone format has to be different.