AC port device for cable television tap

• US 6,393,607 B1
• Filed: 01/27/1999
• Issued: 05/21/2002
• Est. Priority Date: 01/27/1999
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Scientific-Atlanta Incorporated (Cisco Systems, Inc.)
• Inventors: Schlenz, Alan J., Hughes, Jeffrey P.
• Primary Examiner(s): Faile, Andrew
• Assistant Examiner(s): SALCE, JASON P
• Application Number:
  US09/238,960
• Time in Patent Office: 1,210 Days
• Field of Search: 725/149, 725/150, 725/127, 725/128, 725/130, 455/3.03, 333/136, 333/132, 333/134, 333/126, 333/129
• US Class Current: 725/130
• CPC Class Codes: H03H 7/482 particularly adapted for use in common antenna systems
• CPC Class Codes: H04N 7/104 Switchers or splitters

Abstract

A cable television tap (500) for receiving a forward signal including an information signal and a power signal. The tap (500) includes a diplex filter (520) for receiving the forward signal and for separating the information signal from the power signal at outputs of the diplex filter (520) and a plurality of subscriber ports (535) coupled to an output of the diplex filter (520) for receiving the information signal such that the information signal can be accessed at each of the plurality of subscriber ports (535). The tap (500) also includes a removable port device (555) coupled to the other output of the diplex filter (520) for receiving the power signal, and the port device (555) has a connector (550) so that the power signal can be accessed. According to the present invention, when the port device (555) is coupled to the tap (500), the information signal can only be accessed at the subscriber ports (535), and the power signal can only be accessed at the connector (550) of the port device (555). This provides a way to separately transmit the information signal and the power signal over the subscriber property to the subscriber.

Claims

1. A cable television tap for receiving a forward signal comprising an information signal and a power signal, the cable television tap comprising:

a separation device for receiving the forward signal and for separating the information signal from the power signal at its outputs;

a plurality of subscriber ports coupled to the separation device for receiving the information signal such that the information signal can be accessed at each of the plurality of subscriber ports,

a port device coupled to the separation device for receiving the power signal, the port device including a coaxial connector for providing the power signal;

wherein the information signal cannot be accessed at the coaxial connector of the port device, and the power signal cannot be accessed at any of the plurality of subscriber ports;

a housing for enclosing the separation device and the plurality of subscriber ports, wherein the port device is detachable from the housing; and

a panel that can be attached to the housing to replace the port device.

2. A cable television tap for receiving a forward signal comprising an information signal and a power signal, the cable television tap comprising:

an input terminal for receiving the forward signal;

an output terminal coupled to the input terminal for transmitting the forward signal through the cable television tap;

a diplex filter for receiving the forward signal and for separating the information signal from the power signal at its outputs;

a plurality of subscriber ports coupled to the diplex filter for receiving the information signal such that the information signal can be accessed at each of the plurality of subscriber ports;

a port device coupled to the diplex filter for receiving the power signal, the port device including a coaxial connector for providing the power signal, wherein the port device is detachably mounted to the cable television tap; and

a panel that can be attached to a housing of the cable television tap to replace the port device.

3. A cable television system for providing a forward signal comprising an information signal and a power signal to subscriber equipment, the cable television system comprising:

headend equipment for generating the information signal;

a node coupled to the headend equipment for generating the power signal and for combining the information signal and the power signal for transmission throughout the cable television system as the forward signal; and

a tap for receiving the forward signal, the tap comprising;

a separation device for separating the information signal from the power signal at outputs of the separation device;

a plurality of subscriber ports coupled to the separation device for receiving the information signal such that the information signal can be accessed at each of the plurality of subscriber ports;

a port device coupled to the separation device for receiving the power signal, the port device including a coaxial connector for providing the power signal;

a housing for enclosing the separation device and the plurality of subscriber ports, wherein the port device is detachable from the housing; and

a panel that can be attached to the housing to replace the port device.

4. The cable television system of claim 3, wherein, when the panel rather than the port device is mounted to the housing of the tap, both the power signal and the information signal are provided to the plurality of subscriber ports.