Method and apparatus for reliable operation of universal voice grade cards
First Claim
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1. In a fiber-to-the-curb telecommunications system having a fiber-fed terminal with a voice grade card for providing voice telecommunications services, a method of communicating with said voice grade card, said method comprising the steps of:
- a) receiving a frame based downstream time division multiplexed signal wherein said frame based downstream time division multiplexed signal comprises a downstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) downstream data and associated downstream signaling information and wherein said downstream PCM data and said associated downstream signaling information are located in a contiguous fashion within said frame based downstream time division multiplexed signal, and a downstream control channel; and
b) transmitting a frame based upstream time division multiplexed signal wherein said frame based upstream time division multiplexed signal comprises an upstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) upstream data and associated upstream signaling information and wherein said PCM upstream data and said associated upstream signaling information are located in a contiguous fashion within said frame based upstream time division multiplexed signal, and an upstream control channel, wherein in step b) said frame based upstream time division multiplexed signal is transmitted in a bit adjustable offset relationship with respect to a received frame based downstream time division multiplexed signal.
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Abstract
A fiber to the curb communication system providing telephone service to subscribers using line cards which are pluggable into a broadband network unit. The line cards provide telephone service to up to six lines per card. The cards are programmable from a central location, and the system includes self-testing of the cards, ring generator testing and provides for testing of the telephone lines from the system to the subscriber'"'"'s location.
75 Citations
29 Claims
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1. In a fiber-to-the-curb telecommunications system having a fiber-fed terminal with a voice grade card for providing voice telecommunications services, a method of communicating with said voice grade card, said method comprising the steps of:
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a) receiving a frame based downstream time division multiplexed signal wherein said frame based downstream time division multiplexed signal comprises a downstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) downstream data and associated downstream signaling information and wherein said downstream PCM data and said associated downstream signaling information are located in a contiguous fashion within said frame based downstream time division multiplexed signal, and a downstream control channel; and b) transmitting a frame based upstream time division multiplexed signal wherein said frame based upstream time division multiplexed signal comprises an upstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) upstream data and associated upstream signaling information and wherein said PCM upstream data and said associated upstream signaling information are located in a contiguous fashion within said frame based upstream time division multiplexed signal, and an upstream control channel, wherein in step b) said frame based upstream time division multiplexed signal is transmitted in a bit adjustable offset relationship with respect to a received frame based downstream time division multiplexed signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a fiber-to-the-curb telecommunications system having a fiber-fed terminal for delivering voice services, a voice grade card for providing voice telecommunications services, said voice grade card comprising:
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a) means for receiving a frame based downstream time division multiplexed signal wherein said frame based downstream time division multiplexed signal comprises a downstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) downstream data and associated downstream signaling information and wherein said downstream PCM data and said downstream signaling information are located in a contiguous fashion within said frame based downstream time division multiplexed signal, and a downstream control channel; and b) means for transmitting a frame based upstream time division multiplexed signal wherein said frame based upstream time division multiplexed signal comprises an upstream frame overhead channel, a plurality of voice channels, wherein each voice channel contains pulse code modulation (PCM) upstream data and associated upstream signaling information and wherein said PCM upstream data and said associated upstream signaling information are located in a contiguous fashion within said frame based upstream time division multiplexed signal, and an upstream control channel, wherein said voice grade card is insertable in said fiber-fed terminal for delivering voice services and wherein said voice grade card further comprises a connector including a first row having thirty-two pin positions, a second row having thirty-two pin positions, and a third row having thirty-two pin positions wherein; said frame synchronization signal is received on a pin in position 5 of said second row of said connector; said frame based downstream time division multiplexed signal is received on a pin in position 4 of said third row of said connector; and said frame based upstream time division multiplexed signal is transmitted on a pin in position 5 of said third row of said connector. - View Dependent Claims (11, 12, 13, 14)
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15. An insertable voice grade card for use in a fiber-to-the-curb telecommunications system including a fiber-fed terminal which in conjunction with said insertable voice grade card provides telecommunications services, wherein a communication path between said insertable voice grade card and said fiber-fed terminal comprises a frame based downstream time division multiplexed signal, and a frame based upstream time division multiplexed signal, said insertable voice grade card comprising:
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a) circuitry for receiving at least six time division multiplexed signals containing telephone channel information extracted from said frame based downstream time division multiplexed signal which is comprised of as many as thirty bytes of pulse code modulated (PCM) voice data and as many as thirty bytes of signaling data, each byte of PCM voice data and each byte of signaling data being associated with an individual telephone channel; b) circuitry for transmitting at least six time division multiplexed signals containing telephone channel information inserted into said frame based upstream time division multiplexed signal which is comprised of as many as thirty bees of pulse code modulated (PCM) voice data and as many as thirty bytes of signaling data, each byte of PCM voice data and each byte of signaling data being associated with said individual telephone channel; c) circuitry for converting said frame based downstream time division multiplexed signals to analog signals and converting analog signals to said frame based upstream time division multiplexed signals; d) a connector including a first row of thirty-two pin positions, wherein said card is configured to receive said frame based downstream time division multiplexed signal on a pin in position 4 of said first row of said connector, and to provide said frame based upstream time division multiplexed signal to a pin in position 5 of said first row of said connector. - View Dependent Claims (16, 17, 18, 19)
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20. An insertable voice grade card for use in a fiber-to-the-curb telecommunications system including a fiber-fed terminal which in conjunction with said insertable voice grade card provides telecommunications services, wherein a communication path between said insertable voice grade card and said fiber-fed terminal comprises a frame synchronization signal, a frame based downstream time division multiplexed signal, and a frame based upstream time division multiplexed signal, said insertable voice grade card comprising:
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a) circuitry adapted to receive at least six time division multiplexed signals containing telephone channel payloads wherein said telephone channel payloads are extracted from said frame based downstream time division multiplexed signal which is comprised of a plurality of downstream bytes of pulse code modulated (PCM) voice data and a plurality of downstream bytes of signaling data, each downstream byte of PCM voice data and each downstream byte of signaling data being associated with an individual telephone channel; b) circuitry adapted to transmit at least six time division multiplexed signals containing telephone channel payloads wherein said telephone channel payloads are inserted into said frame based upstream time division multiplexed signal which is comprised of a plurality of upstream bytes of pulse code modulated (PCM) voice data and a plurality of upstream bytes of signaling data, each upstream byte of PCM voice data and each upstream byte of signaling data being associated with an individual telephone channel; and c) circuitry adapted to convert said downstream bytes of PCM voice data to analog signals and adapted to convert analog signals to said upstream bytes of PCM voice data. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification