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AssigneeAlcatel
InventorsJurgen Elisabeth Romain Dunja Content, Elve Desiderius Jozef Moons, Luc Josephine Theoduul De Clercq
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Modem systems comprising Asymmetric Digital Subscriber Line modems (1,21) or ADSL modems (1,21) coupled via bidirectional lines (40) are insufficiently flexible. By providing the modems (1,21) with tunable analog filters (4,23), the upstream/downstream bandwidths can be adapted, in response to request signals. In case of said tunable analog filter being a tunable high pass filter (4) located in a first network modem (1), more bandwidth for the downstream can be introduced. In case of said request signal originating from a generator (31) in a second terminal modem (21), the terminal can request more bandwidth for the downstream, for example for video on demand. In case of said tunable analog filter being a tunable low pass filter (23) in said first modem (21), less bandwidth for the upstream can be introduced, thereby creating more bandwidth for the downstream. Said tunable analog filter (4,23) comprises a filter element like a capacity which is (de)activatable via a switch like a relais or a transistor.
Modem system comprising a first modem (1) and a second modem (21) coupled via a bidirectional line (40), with each modem (1,21) comprising a transmitting part (3,4,5,23,24,25) and a receiving part (7,8,9,27,28,29), with each part comprising at least one analog filter (3,4,7,9,23,24,27,29), characterised in that said first modem (1) comprises at least one analog filter (3,4,7,9) which is tunable in response to a request signal.
First modem (1) for use in a modem system comprising said first modem (1) and a second modem (21) coupled via a bidirectional line (40), with each modem (1,21) comprising a transmitting part (3,4,5,23,24,25) and a receiving part (7,8,9,27,28,29), with each part comprising at least one analog filter (3,4,7,9,23,24,27,29), characterised in that said modem (1) comprises at least one analog filter (3,4,7,9) which is tunable in response to a request signal.
Second modem (21) for use in a modem system comprising a first modem (1) and said second modem (21) coupled via a bidirectional line (40), with each modem (1,21) comprising a transmitting part (3,4,5,23,24,25) and a receiving part (7,8,9,27,28,29), with each part comprising at least one analog filter (3,4,7,9,23,24,27,29), characterised in that said second modem (21) comprises at least one analog filter (23,24,27,29) which is tunable in response to a request signal.
First modem method for use in a modem system comprising a first modem and a second modem coupled via a bidirectional line, with each modem comprising a transmitting part and a receiving part, with each part comprising at least one analog filter, characterised in that said method comprises the step of tuning at least one analog filter in response to a request signal.
Second modem method for use in a modem system comprising a first modem and a second modem coupled via a bidirectional line, with each modem comprising a transmitting part and a receiving part, with each part comprising at least one analog filter, characterised in that said method comprises the step of tuning at least one analog filter in response to a request signal.
Dependencies are inferred from the claim text.