Claims
- 1. A telecommunications system, comprising:
a digital loop carrier servicing a calling modem via a calling modem's line; a local central end office coupled to the digital loop carrier via a central office trunk group; an internet access bypass modem bank coupled to the digital loop carrier via a bypass trunk group; and a bypass initiator coupled to the digital loop carrier via an incoming call signaling path and coupled to the local central end office via command signaling path; wherein, in response to a bypass command received through the command signaling path, the digital loop carrier is operable to reroute data from a call originating at the calling modem from the central office trunk group to the bypass trunk group while maintaining a calling modem hook status signaling connection of the call on the central office trunk group.
- 2. A telecommunications system as in claim 1, further comprising:
an internet access provider telephone receiving modem existing in the incoming call signaling path and the command signaling path.
- 3. A telecommunications system as in claim 2, further comprising:
a calling number bypass table coupled to the bypass initiator.
- 4. A telecommunications system as in claim 1,
wherein the local central end office exists in the command signaling path.
- 5. A telecommunications system as in claim 4, further comprising:
a called number bypass table coupled to the bypass initiator; a calling number bypass table coupled to the bypass initiator; and a modem bank status table coupled to the bypass initiator.
- 6. A telecommunications system as in claim 1,
wherein the bypass initiator is operable to disconnect from the call after the digital loop carrier has rerouted the call.
- 7. A telecommunications system as in claim 6,
wherein the local central end office releases central office trunk group resources allocated to the call and remembers the off hook status of the calling modem after a timeout period has elapsed.
- 8. A digital loop carrier, comprising:
a time slot interchanger operable to switch data between various time slots of a time multiplexed signal; a demultiplexor coupled to the time slot interchanger operable to physically demultiplex the time multiplexed signal onto a plurality of physically separate output trunks; a central office output trunk group coupled to the demultiplexor; a bypass output trunk group coupled to the demultiplexor; a controlling state machine coupled to the time slot interchanger and demultiplexor; a central office command interface coupled to the controlling state machine for allocating and deallocating central office output trunk group time slots; and a bypass command interface coupled to the controlling state machine for controlling the interchanging of data between time slots demultiplexing to different output trunk groups.
- 9. A digital loop carrier as in claim 8,
wherein, upon receipt of a bypass command through the bypass command interface, the time slot interchanger is operable to switch modem data from a central office output trunk time slot that demultiplexes to a central office output trunk to a bypass output trunk time slot that demultiplexes to a bypass output trunk time slot.
- 10. A digital loop carrier as in claim 9,
wherein, after the time slot interchanger switches the modem data from the central office output trunk time slot to the bypass output trunk time slot, the controlling state machine is operable issue a connect message through the bypass command interface.
- 11. A digital loop carrier as in claim 9,
wherein the time slot interchanger is operable to continue delivering bit-oriented hook status associated with the modem data to the central office output trunk time slot after the time slot interchanger has switched the modem data from the central office output trunk time slot to the bypass output trunk time slot.
- 12. A digital loop carrier as in claim 11,
wherein, upon receipt of a disconnect message through the central office command interface, the controlling state machine is operable to issue a release command through the central office command interface.
- 13. A digital loop carrier as in claim 12,
wherein, upon detecting an on hook status through bit-oriented signaling in an input time slot of the modem data, the controlling state machine is operable to issue a disconnect message through the bypass command interface.
- 14. A digital loop carrier as in claim 13,
wherein, upon detecting an on hook status through bit-oriented signaling in an input time slot of the modem data, the controlling state machine is operable to periodically issue a disconnect message through the bypass command interface until an acknowledging release message is received.
- 15. A method of routing a data call at a digital loop carrier, the method comprising the steps of:
receiving a bypass command through a bypass command interface; and switching modem data from a central office output trunk time slot that demultiplexes to a central office output trunk to a bypass output trunk time slot that demultiplexes to a bypass output trunk time slot.
- 16. A method of routing a data call at a digital loop carrier as in claim 15, further comprising the step of:
after the modem data is switched from the central office output trunk time slot to the bypass output trunk time slot, issuing a connect message through the bypass command interface.
- 17. A method of routing a data call at a digital loop carrier as in claim 15, further comprising the step of:
continuing to deliver bit-oriented hook status associated with the modem data to the central office output trunk time slot after switching the modem data from the central office output trunk time slot to the bypass output trunk time slot.
- 18. A method of routing a data call at a digital loop carrier as in claim 17, further comprising the step of:
upon receipt of a disconnect message through a central office command interface, issuing a release command through the central office command interface.
- 19. A method of routing a data call at a digital loop carrier as in claim 18, further comprising the step of:
upon detecting an on hook status through bit-oriented signaling in an input time slot of the modem data, issuing a disconnect message through the bypass command interface.
- 20. A method of routing a data call at a digital loop carrier as in claim 19, further comprising the step of:
upon detecting an on hook status through bit-oriented signaling in an input time slot of the modem data, periodically issuing a disconnect message through the command interface until an acknowledging release message is received.
RELATED PROVISIONAL PATENT APPLICATION
[0001] This utility patent application claims the benefit of U.S. Provisional Application No. 60/925,837, filed on Sep. 5, 1996.
Provisional Applications (1)
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Number |
Date |
Country |
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60025837 |
Sep 1996 |
US |