Patent ID: 6765957
Filing Date: 2004-07-20
Classification: H04L,Y02D

Abstract:
A communication apparatus at a remote location that is connectable to a communication apparatus at a central location, comprising:a negotiation data transmitter that simultaneously transmits first, second and third negotiation data having identical data with an identical timing to said communication apparatus at the central location, each of said first, second and third negotiation data comprising: an identification field that includes at least modulation independent information; a standard information field that includes at least modulation dependent information; and a non-standard information field that includes information other than information associated with said identification field and information associated with said standard information field, wherein said first negotiation data is transmitted with a first carrier frequency equal to 9 times a base family frequency, said second negotiation data is transmitted with a second carrier frequency equal to 17 times said base family frequency, and said third negotiation data is transmitted with a third carrier frequency equal to 25 times said base family frequency.