Glossary O

Office

To facilitate management and show the actual physical relation of the equipment, all the NEs in respective actual transmission telecommunication rooms are grouped into offices.

Operation set

A collection of multiple client operations. Operation set facilitates authority management in the NMS system. Since different client operations have different influences on system security, the operations with similar influence on system security are added in an operation set. In this way, if the authority in this operation set is assigned to a user (user group), the user (user group) will have the authority of all operations in the operation set. The U2000 Web LCT has a default operation set. If the default operation can not meet the requirement for authority assignment, the user can create a new one.

Optical NE

Optical Network Element (ONE) is the transport entity that implements the NE functions (terminal multiplexing, add/drop multiplexing, cross-connection and regeneration) in a DWDM layer network. The types of ONEs include OTM, OADM, OLA, REG and OXC.

Optical NE

The locating of an ONE is equivalent to that of a common SDH NE. In a view, an ONE is displayed with an icon, like a common SDH NE and its alarm status can be displayed with colors. Logically, an ONE consists of different shelves. Like a common NE, an ONE cannot be expanded or entered like a sub-network. Similar to a common NE, an ONE provides a list of the shelves that form the NE to display the board layout.

Optical supervisory channel

Optical Supervision Channel is an independent optical channel in the DWDM system, which achieves the management function similar to the frame overhead bytes in the SDH system. Optical monitor channel features independence of traffic channel. In the optical signal transmission direction, the optical signals of the supervisory channel and the multiplexed and amplified optical signals of the service channel are converged to the backbone transmission fiber. In the optical signal receiving direction, the optical signals of the supervisory channel are split first and then the service channel is preamplified and demultiplexed. Therefore, in DWDM transmission system the monitor channel optical signals are not amplified, but they are terminated and regenerated at each site. However the service channel optical signals are on the contrary. They are amplified many times during the transmission, but they are not terminated or regenerated.

Optical trail

It is the end-to-end optical wavelength. After creating the fiber/cable among the DWDM equipment, the optical trails OCH, OTS and OMS are available at the same time, so you do not need to create/search for any more optical trail.

Orderwire break-in

The called party in communication receives the call prompt (BB tone) of the third party, he can directly press the "#" key to clear the line currently in communication and then establish the communication with the break-in party. The phone with the forced break-in authority can be used to break in the phone forcedly by dialing "# + phone number". Orderwire authorized break-in cannot be done unless no hotline or private telephone is set on the corresponding Phone port.

OSC board

The SC1 or SC2 board, which is responsible for ALC protocol byte processing.