# CO Tone Detection

## Purpose

The CO Tone Detection form allows you to enable or disable Tone Detection for Central Office trunks. You can also change the parameters for tone detection.

Use this form to perform the following tasks:

- Change Tone Detection for CO Trunks

## Field Descriptions

Parameter | Description | Default Value
CO Tone Detection Enabled | Select the check box to enable the CO Tone Detection feature. Clear the check box to disable the feature. | Disabled/false
Country | A read-only field that indicates the country variant of the system. NOTE: If "Invalid" is displayed in this field, see Changing Tone Detection for CO Trunks to update this field. |
Sample Time (s) | Enter the time in seconds. This value is the length of time required by MiVoice Business to analyze the CO tone on the line. The range is from 1 to 10 seconds. | Blank
Delay Time (s) | Enter the delay time in seconds. This value is the length of time a line must be off hook before MiVoice Business begins CO tone detection. The range is from 1 to 30 seconds. | Blank
Sensitivity (dB) | Enter the Sensitivity in decibels (dB). This value is the tone level threshold for the tone detector. It must be a negative value. The range is from -40 to 0. | Blank
Tone Type | Select continuous tone or select non-continuous tone. | Blank
Frequency 1 (Hz) | Enter the number in Hertz for Frequency 1. The range is from 0 to 4KHz. | Blank
Frequency 2 (Hz) | Enter the number in Hertz for Frequency 2. The range is from 0 to 4KHz. | Blank
On 1 (ms) | Enter the ON 1 cadence in milliseconds. This value is the duration of the first tone burst (the ON time). The range is from 0 to 10,000 milliseconds. NOTE: ON_1, OFF_1, ON_2, and OFF_2 are the basic ON and OFF bursts (in milliseconds) that may repeat, in that order, to constitute the tone's cadence. | Blank
Off 1 (ms) | Enter the OFF 1 cadence in milliseconds. This value is the time between the first and second tone burst (the OFF time). The range is from 0 to 10,000 milliseconds. | Blank
On 2 (ms) | Enter the ON 2 cadence in milliseconds. This value is the duration of the second tone burst (the ON time). The range is from 0 to 10,000 milliseconds. | Blank
Off 2 (ms) | Enter the OFF 2 cadence in milliseconds. This value is the time between the second tone burst and the next tone burst (the OFF time). The range is from 0 to 10,000 milliseconds. | Blank