Patent ID: 7187711

Claim:
In a communications system having a first modem pool for communicating with a second modem pool via a communications channel, each modem pool comprising a plurality of modems and having at least one NEXT cancellation filter, a method for modem wake-up comprising the steps of: during a first time period: a) activating at least one of the modems in said first modem pool; b) deactivating at least one of the modems in said second modem pool; for at least one target modem in said first modem pool: c) activating said first modem pool NEXT cancellation filter; d) measuring a NEXT transfer function for said target modem and at least one other disturber modem in said first modem pool; during a second time period: e) activating at least one of the modems in said second modem pool; f) deactivating at least one of the modems in said first modem pool; for at least one target modem in said second modem pool: g) activating said second modem pool NEXT cancellation filter; h) measuring a NEXT transfer function for said second modem pool target modem and at least one other disturber modem in said second modem pool.