# ARS Call Progress Tone Detection

## Purpose

The ARS Call Progress Tone Detection form specifies which call progress tones should be detected during call set-up and the action to take in response to each tone. A maximum of 100 call progress tone detection plans can be programmed.

Dial tone is detected by an algorithm that monitors the frequency and energy characteristics of the incoming signal. Dial tone is detected when any large signal is present for sufficient time. The algorithm relies on the assumption that no other tone is expected at that time. This technique can detect dial tones that are not listed in the table of detectable tones, noise-based dial tones, and tones that have corrupted frequency characteristics. Frequency detection of dial tone is faster than the energy detection technique.

Use this form to perform the following tasks:

- Program Automatic Route Selection

- Program Advanced Automatic Route Selection

- Program for Tone Detection

- Program Digital E&M Voice Mail Interface

For more information about ARS:

- Advanced Automatic Route Selection Description

For more information about frequency and cadencing:

- Hardware Technical Reference Manual

## Conditions

- To ensure dial tone is received before outpulsing begins, use an ARS Call Progress Tone Detection Plan for loop start calls. The ARS Call Progress Tone Detection form is referred to by the ARS Digit Modification Plans form.

## Field Descriptions

Parameter | Description | Default Value
Tone Plan Number | Enter a number to identify the ARS Call Progress Tone Detection plan. Can be between 0 and 99. | Blank
Maximum Wait For A Tone | Enter a number to indicate the duration (in seconds) that the system will wait for a tone before taking the action indicated in the "Action on time-out" entry. Can be between 0 and 99. | Blank
Action on Time-out | Select the action to take if the Maximum Wait for a Tone expires.
Action | Definition
Outpulse default | Outpulse tone as defined by the appropriate Trunk Circuit Descriptor form.
Outpulse DTMF | Always outpulse DTMF tones (overrides the default tone).
Busy tone and release | Release the trunk and send a busy signal to the caller.
Reorder tone and release | Release the trunk and send a reorder tone to the caller.
Give answer | Connect both parties (talk state).
| Blank
Tones to Detect |
Member Number | System-generated, protected field. Identifies the member. |
Tone To Detect | Select a detectable tone (see table below). For accurate results, enter only one tone for each Tone Plan Number. | Speech
Action To Take | Select the action to take if the specified tone is detected.
Action | Definition
Outpulse default | Outpulse tone as defined by the appropriate Trunk Circuit Descriptor form.
Outpulse DTMF | Always outpulse DTMF tones (overrides the default tone).
Busy tone and release | Release the trunk and send a busy signal to the caller.
Reorder tone and release | Release the trunk and send a reorder tone to the caller.
Give answer | Connect both parties (talk state).
| Blank

Tone to Detect
Speech | UK Busy Tone | CH China Continuous Dial Tone
NA North America Dial Tone mod 120 | UK NU Tone | CH Busy Tone
NA Dial Tone mod 133 | UK Audible Ringback | CH Congestion Tone
NA Precise Dial Tone | UK Precise Audible Ringback | CH Vacant Number Tone
NA Specialized Carrier Dial Tone | UK Precise Dial Tone | NL Netherlands Dial Tone
NA Reorder Tone | NZ New Zealand Dial Tone | ES ISO abbreviation for Spain Dial Tone
NA Busy Tone | NZ Ringback | PT Portugal Dial Tone
NA Audible Ringback | NZ Busy Tone | LA Latin America Dial Tone
NA Precise Audible Ringback | NZ Number Unobtainable | BR Brazil Dial Tone
NA Priority Ring Back | MA Malaysia Dial Tone | FR France Dial Tone
UK United Kingdom 50Hz Dial Tone | IT Italy. Dial Tone | AU Australia Dial Tone
UK Congestion Tone | GE Gigabit Dial Tone |

## Example

- Advanced Automatic Route Selection Programming Example