Access line termination system, access line termination device and transmission control method
AssigneeNEC Corporation
InventorHirokazu Ozaki
Life of this patent
Estimating the term…
Abstract
An access line termination device is provided which enables down transmission capacity to be expanded in a normal state without changing/modifying a transmission path interface. An up signal of an access line accommodated in a remote device is applied to an interface unit through a line termination unit and multiplexed. Furthermore, the up signal multiplexed at the interface unit is applied to an optical expansion unit, multiplexed with a clockwise down signal from a parent device and sent as a signal directed to an adjacent remote device. At the adjacent remote device, an up signal of its own device and the signal from the remote device 6 at a preceding stage are multiplexed and sent out to a remote device at a subsequent stage.
Claims24
An access line termination system with an access line termination device which terminates asymmetric up signal and down signal connected in a ring for causing said up signal and said down signal to travel, wherein
- said down signal is separated to travel rightward and leftward on said ring, and
- said access line termination device includes a multiplexing unit which multiplexes either one of said rightward and leftward down signals with said up signal to transmit the multiplexed signal on the same signal line.
An access line termination device which terminates asymmetric up signal and down signal and forms a ring together with other adjacent device to cause said up signal and said down signal to travel, which
- separates said down signal to cause the signal to travel rightward and leftward on said ring, and
- includes a multiplexing unit which multiplexes either one of said rightward and leftward down signals with said up signal to transmit the multiplexed signal on the same signal line.
A transmission control method of an access line termination system with an access line termination device which terminates asymmetric up signal and down signal connected in a ring to cause said up signal and said down signal to travel, comprising the steps of:
- separating said down signal to cause the obtained signal to travel rightward and leftward on said ring, and
- multiplexing either one of said rightward and leftward down signals with said up signal and transmitting the multiplexed signal on the same signal line.
Dependencies are inferred from the claim text.