# Class of Service (COS)

## Description

Class of Service (COS) defines a station or trunk's feature and timer options. A station or trunk may have three COSs (Day/Night1/Night2 service). The COS may be temporarily changed by using a Verified Account Code.

## Conditions and Feature Interactions

None

## Programming

1. Station Attributes form

- Assign a Class of Service (COS) to each directory number for each mode of service in the

2. Class of Service Options form

- Configure options for each COS level required.

- Set the Calling Party Name Substitution option to Yes.

## Device Support

Not applicable

## Operation

None

Related Topics

- Class of Restriction

- Intercept Handling