Disconnect Supervision (FXO Only)

The Disconnect Supervision parameter is used to select the method used to detect when the telephone equipment attached to a voice port goes from an off-hook (active) to an on-hook (idle) state. You have the following two options:

• Power Interrupt -- the voice channel monitors Tip and Ring for the absence of loop current for 600 ms or longer. Note that the attached PBX must be capable of supporting this setting as described.
• Tone -- if the attached PBX or CO cannot supply a power interrupt signal, the voice channel looks for a call progress tone of 600 Hz or less. Only FXO to FXS applications are supported with this setting.