US 5,706,111 A · Optical communications network

Abstract

For subscriber access, via optical fibre, to communications networks that offer various types of service by means of an optical access node (AN), connections between the optical network terminating units (ONT) unit to which the subscribers are connected, and the access node (AN) can be made with point-to-point or point-to-multipoint fibre optic links. The links between the access node (AN) and the switching centre (CE) are made via optical fibres through which pass the lightwave signals corresponding to a number of subscribers, multiplexed together by means of wavelength division multiplexing. This network permits access to all types of communications services in which each type of service employs a reserved wavelength for its connection between the access node (AN) and the optical network terminating equipment (ONT) unit. This reserved wavelength is fixed and depends only on the type of service.

Claims14

Dependent claims

Optical communications network for connecting a set of optical network terminating (ONT) units to a switching center (CE), in which a transmission of signals of plural communications services between the optical network terminating units and the switching center passes, in transparent form, through an access node (AN), wherein

the transmission of said signals between this access node (AN) and the switching center (CE) is done on optical fibers by wavelength division multiplexing for transmitting at least one of said communications services in different wavelengths between said access node and said switching center, wherein
the transmission of signals between the access node (AN) and the optical network terminating (ONT) units is done on optical fiber, and wherein
the signals that are transmitted between the access node (AN) and the optical network terminating (ONT) units do so making use of a same wavelength reserved for each communications service.

Optical communications network for connecting a set of optical network terminating (ONT) units to a switching center (CE), in which a transmission of signals between the optical network terminating units and the switching center passes, in transparent form, through an access node (AN), wherein

the transmission of signals between this access node (AN) and the switching center (CE) is done on optical fibers by wavelength division multiplexing for transmitting at least one communications service in different wavelengths between said access node and said switching center, wherein
the transmission of signals between the access node (AN) and the optical network terminating (ONT) units is done on optical fiber, and wherein
the signals that are transmitted between the access node (AN) and the optical network terminating (ONT) units do so making use of a same wavelength reserved for a same communications service,
wherein for multiple types of communications services transmitted between the access node and the optical network terminating (ONT) units, each type of communications service uses a different wavelength, and
wherein in a direction of transmission from the optical network terminating units to the switching center (CE), each different wavelength reserved for each communications service is demultiplexed in the access node (AN).

2 more elements

Dependencies are inferred from the claim text.

Optical communications network

Life of this patent

Optical communications network

Life of this patent

Abstract

Claims14