| 摘要 |
<p>Disclosed is apparatus for providing a completely flexible arrangement for relating key telephone lines to stations and to provide special features as desired to selected stations and lines. A patch or jack panel is provided with appearances for each station and for each line or trunk. Interconnect or cross connect cords or cables may be secured between stations and lines to provide line appearances at the respective stations for each crossconnection made. Further provisions are made for providing line to station ringing on selected lines under power failure conditions and for providing selected class of service for selected lines. Use of this apparatus allows the interconnection of lines to key appearance to be made as desired on installation of the system, on location. IN addition, changes can readily be made in the interconnections whenever such changes are required.</p> |
