Method of activating tandem digital subscriber lines
First Claim
1. A method for activating tandem digital subscriber lines connected by a carrier system in a communication link connecting a switch and a network termination, said method comprising the steps of:
- fully activating a first digital subscriber line, said first digital subscriber line being proximate the switch, in both upstream and downstream directions; and
activating a second digital subscriber line, said second digital subscriber line being proximate the network termination, in the downstream direction after the first digital subscriber line is fully activated, whereby the network termination does not prematurely consider the communication link to be fully activated.
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Accused Products
Abstract
A method for activating tandem digital subscriber lines separated by a carrier system in a communication link connecting a switch and a network termination is implemented by a microcontroller which interfaces with a digital subscriber line transceiver to extract and transmit activation request information and a programmable gate array to relay and interpret activation information conveyed across the carrier system. The microcontroller intelligently combines the activation information received from the carrier system, the activation indicator bit received from the digital subscriber line transceiver, and the transceiver status to independently activate the digital subscriber lines in a controlled sequence, so that a proper response is conveyed to the T-interface to preclude premature regarding of the physical transmission channel as being transparent. This is achieved by not setting the downstream activation bit to the network termination to 1 until each upstream digital subscriber line is fully activated in both directions.
35 Citations
16 Claims
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1. A method for activating tandem digital subscriber lines connected by a carrier system in a communication link connecting a switch and a network termination, said method comprising the steps of:
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fully activating a first digital subscriber line, said first digital subscriber line being proximate the switch, in both upstream and downstream directions; and activating a second digital subscriber line, said second digital subscriber line being proximate the network termination, in the downstream direction after the first digital subscriber line is fully activated, whereby the network termination does not prematurely consider the communication link to be fully activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification