| 摘要 |
<p>A communication system includes a controller, a data pump under the control of the controller and a data access arrangement under the control of the controller. The controller establishes a data communication session with a remote communication system using the data pump and the data access arrangement. The controller then places the communication session in an on-hold state for a period of time and generates an indication relating to a status of the on-hold state. The controller may generate a sound as an indication or may transmit data relating to the status. The sound may be generated by toggling a relay in the data access arrangement, by transmitting a tone or by transmitting an audio sample. The audio sample may be generated by a codec controlled by the controller. The indication is generated to provide a progress notification relating to the period of time, a warning notification relating to the period of time or an expiration notification of the period of time.</p> |
