Splitterless multicarrier modem

A method in asymmetric digital subscriber loop (ADSL) communications having both upstream and downstream communication subchannels formed from a plurality of subchannels, comprising:

• storing a first table defining data communications during a first communication condition between a modem and a second modem connected to said loop in an absence of disturbance events;
• storing a second table defining data communications during a second communication condition between said modem and said second modem responsive to shifts in an amplitude and phase of at least one of said communication subchannels over successive frames;
• and
• generating a signal to initiate switching of said first and second tables when said shifts exhibit a defined pattern.

A method for ADSL communications having both upstream and downstream communication subchannels formed from a plurality of subchannels, comprising:

• storing a first table defining data communications during a first communication condition between a first modem and a second modem connected to a loop in an absence of disturbance events;
• and
• storing a second table defining data communications during a second communication condition between said first modem and said second modem responsive to shifts in an amplitude and phase of at least one of said communication subchannels over successive frames;
• and
• switching between said first and second tables responsive to an occurrence of said disturbance events.

A modem for use in ADSL communications having both upstream and downstream communication subchannels formed from a plurality of subchannels, comprising:

• means for storing a first table defining data communications during a first communication condition between said modem and a second modem coupled to a loop during a first communication state in an absence of disturbance events;
• means for storing a second table defining data communications during a second communication condition between said modem and said second modem during a second communication state responsive to one or more of said disturbance events, wherein said second modem is responsive to shifts in an amplitude and phase of at least one of said plurality of subchannels over successive frames;
• and
• means for generating a signal initiating switching of said first and said second tables when said shifts exhibit a defined pattern.

A modem for use in symmetric or asymmetric digital subscriber loop communications (ADSL) having both upstream and downstream communication subchannels formed from a plurality of subchannels, comprising:

• means for storing a first table defining data communications during a first communication condition including an absence of disturbance events between said modem and a second modem coupled to a loop of said symmetric or ADSL communications during a first communication state;
• means for storing a second table defining data communications during a second communication condition between said modem and said second modem during a second communication state responsive to one or more said disturbance events, wherein the second modem is responsive to shifts in an amplitude and phase of at least one of said communication subchannels over successive frames;
• means for generating a signal initiating switching between said first and second tables when said shifts exhibit a defined pattern;
• and
• means for switching between said tables responsive to the occurrence of said disturbance events.

A storage medium having stored thereon, computer-executable instructions that, if executed by a computing device, cause the computing device to perform operations comprising:

• storing a first table defining data communications during a first communication condition including an absence of disturbance events between a first modem and a second modem coupled to a communications loop;
• storing a second table defining data communications during a second communication condition between said first modem and said second modem responsive to an amplitude or phase of at least one of a plurality of communication subchannels over successive frames;
• and
• generating a signal to initiate switching of said first and second tables when said shifts exhibit a defined pattern.