Products & Services

Xtera’s repeaters also have an in-built accelerometer that allows us to monitor repeater handling during marine operations, and the system owner to track any unexpected movement after installation.

Key repeater features are:

• C and C+L band variants with optical bandwidth up to 70nm
• Depth capability qualified to 8,000m
• 2,4,6 fibre pair variants
• High reliability design, with redundancy in pumps and controllers
• Per amplifier tilt control, removing the need for separate tilt equalisers.
• Active supervisory & C-OTDR compatibility

• Simpler to configure than current-steering
• More stable; only changes state when a command is sent
• Can be locked for safety
• Can be powered up from a single leg
• Can isolate a leg for insulation testing

The branching unit has been designed to allow hot switching without damage. Maximum deployment depth, using standard Light Weight cable, is >5,000m.

Xtera’s NMS manages the wet-plant, Nu-wave™ Optima and PFE, automatically logging alarms, events and performance data and allowing an operator to monitor and control these units. Users login via a secure password system and their access is controlled by a profile set by the System Administrator.

The system can limit users to access only certain equipment, or give the ability to monitor, but not control/change system parameters. The NMS is a Client-Server architecture, based on a LINUX/ SUN server and PCs as clients. The NMS manages the equipment in several sites
and supports multiple clients.

Xtera has a number of products designed to support Open systems, facilitating separate supply of terminal, power feeding and wet plant equipment.

Our Open system family provides active supervisory of the submerged plant and allows monitoring of the PFE via the NMS. In the Open System Gateway (OSG) fibre pairs are independently controlled and isolated from each other.

Additionally, units may be fitted to allow the bandwidth of a fibre to be shared, effectively creating virtual fibre pairs with users completely isolated from each other. High reliability amplifiers control power levels and loading modules fill unused bandwidth, avoiding the problems that would occur if a terminal were to fail or be disconnected. The OSG is fully managed by the NMS.

Key features are:

• Extended reach through Raman amplification
• Common, integrated set of plug-and-play modules
• Fully tuneable line units over the entire bandwidth
• High power Raman and ROPA for industry-leading spans without repeaters
• End-to-end unified network management system
• A range of simple and cost-effective protection schemes
• Repeater LME supervisory
• Data Communications facilities
• Reconfigurable Optical Add Drop Multiplexer (ROADM)

Xtera is the industry leader in unrepeatered applications, experienced in both equipping existing links and complete build systems. Xtera uses combinations of forward and backwards Raman pumping and ROPAs for maximum unrepeatered reach. The Nu-waveTM Optima has demonstrated 100Gbit/s transmission over a 627 km fibre span.

The Nu-Wave LME provides a complete solution for submerged plant implementing either ‘active’ or ‘passive’ monitoring. The LME-A (LME-Active) provides the ability to interrogate Xtera submerged plant, both repeaters and BU, together with legacy submerged plant available from other Suppliers. The LME-P (LME-Passive) provides the means for monitoring submerged plant from other suppliers who implement only a ‘passive’ plant monitoring scheme. The LME is accessible from the Nu-Wave NMS.

The LME-A allows the monitoring and control of submerged plant based upon low-frequency optical signaling to the submerged plant. The modulation schemes implemented handled both Xtera submerged plant – which is binary PSK-based, and competitor submerged plant – which varies between OOK and binary PSK, which depends upon the system in question. All submerged plant is provided with a unique address, during manufacture, which allows each repeater/BU to be interrogated or controlled on an individual basis, using a command and response protocol.

The LME-P allows the monitoring of submerged plant which provides no active means of interrogation or control, only passive optical loopback of transmitted signals. The loopbacks with the submerged plant are implemented as High-Loss LoopBacks (HLLB) which feeds back a portion of the ‘transmit’ signal onto the received signal within a fiber-pair.

This document provides outline details of Xtera’s Submarine Repeater. Please note that repeaters provided for specific applications may have different parameter values / may be configured differently and that this description does not represent a contractual commitment in any way.

This document provides outline details of Xtera’s Branching Unit (BU). Please note that BUs provided for specific applications may have different parameter values / may be configured differently and that this description does not represent a contractual commitment in any way.

This document provides high level details of Xtera’s Nu-Wave Network Management System (NMS). Please note that changes in future releases may impact features and capabilities described below and that this description does not represent a contractual commitment in any way.

This document provides outline details of Xtera’s Branching Unit (BU). Please note that BUs provided for specific applications may have different parameter values / may be configured differently and that this description does not represent a contractual commitment in any way.

This document provides outline details of Xtera’s Nu-Wave Optima^TM Platform. Please note that equipment provided for specific applications may have different parameter values / may be configured differently and that this description does not represent a contractual commitment in any way.

This document provides outline details of Xtera’s Unrepeatered System solutions. Please note that this description does not represent a contractual commitment in any way.

This document provides high-level details of Xtera’s Nu-Wave Line Monitoring Equipment (LME). Please note that changes in future releases may impact features and capabilities described below and that this description does not represent a contractual commitment in any way.