Modem data call bypass of a telephone network voice switch
First Claim
1. A bypass system for modem data call bypass of a telephone network voice switch comprising:
- a line card connected to a subscriber line for selectively connecting said subscriber line to one of said voice switch and a router;
a data call prefix detector for controlling the selective connection of the subscriber line in response to a data call prefix that precedes a data call telephone number dialed on the subscriber line;
a voiceband call concentrator connected between said line card and said voice switch, said voiceband call concentrator being connected to the subscriber line in the absence of said data call prefix; and
a data call concentrator connected between said line card and said router, said data call concentrator being connected to the subscriber line in the presence of said data call prefix.
3 Assignments
0 Petitions
Accused Products
Abstract
A data bypass system diverts data calls to a central office based modem bank and a data network at the subscriber'"'"'s discretion. The data call diversion is based on a data service prefix in the user'"'"'s dialing string. The data bypass device translates a subsequent telephone address of a data service supplier into a data network address. The data bypass system is either analog or digital and has a line card with a switch that selectively connects the subscriber line to the voice switch or to a data switch or router through two respective concentrators. The line card includes a data call prefix detector that controls the switch in response to a data call prefix that precedes a data call telephone number. The analog bypass system diverts a data call to a modem and a data network before the data call reaches a voiceband filter and an A/D converter of the line card, while the digital bypass system diverts the data call through a wideband filter and an A/D conversion before applying the data call to a modem accepting a digitized line signal. The digital bypass system utilizes a line card with two filter and A/D converter modules, one for voice calls and another for data calls. Instead of being in each line card, all the line cards share a telephone number and data service prefix detector located following the voice call concentrator.
58 Citations
32 Claims
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1. A bypass system for modem data call bypass of a telephone network voice switch comprising:
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a line card connected to a subscriber line for selectively connecting said subscriber line to one of said voice switch and a router; a data call prefix detector for controlling the selective connection of the subscriber line in response to a data call prefix that precedes a data call telephone number dialed on the subscriber line; a voiceband call concentrator connected between said line card and said voice switch, said voiceband call concentrator being connected to the subscriber line in the absence of said data call prefix; and a data call concentrator connected between said line card and said router, said data call concentrator being connected to the subscriber line in the presence of said data call prefix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A line card of a telephone network, comprising:
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a switch that switches to selectively connect a subscriber line to one of a telephone network voice switch and a router; and a data call prefix detector that controls switching of said switch in response to a data call prefix that precedes a data call telephone number on said subscriber line, said data call telephone number having a corresponding data networking address available from a network address conversion directory. - View Dependent Claims (27)
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28. A line card of a telephone network, comprising:
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a switch that switches to selectively connect a subscriber line to one of a voice switch and a router; a data call prefix detector that controls switching of said switch in response to a data call prefix that precedes a data call telephone number on said subscriber line; and a voice-band filter and a first analog to digital converter to filter and digitize signals directed to said voice switch. - View Dependent Claims (29, 30, 31)
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32. A bypass system for modem data call bypass of a telephone network voice switch comprising:
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a line card connected to a subscriber line that selectively connects the subscriber line to one of said voice switch and a data switch; a data call prefix detector that controls the selective connection of the subscriber line in response to a data call prefix that precedes a data call telephone number dialed on the subscriber line; a voiceband call concentrator connected between said line card and said voice switch, said voiceband call concentrator being connected to the subscriber line in the absence of said data call prefix; and a data call concentrator connected between said line card and said data switch, said data call concentrator being connected to the subscriber line in the presence of said data call prefix.
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Specification