Cisco Cisco ONS 15454 M12 Multiservice Transport Platform (MSTP) Installation Guide

© 2006 Cisco Systems, Inc. All rights reserved.

This document provides a card description, specifications, and installation procedure for the dense 
wavelength division multiplexer (DWDM) OPT-BST card. The OPT-BST card is compatible with Cisco 
ONS 15454 SONET (ANSI) and Cisco ONS 15454 SDH (ETSI) shelf assemblies. Use this document in 
conjunction with the Cisco ONS 15454 DWDM Procedure Guide when working with OPT-BST cards.

This document contains the following sections:

Optical amplifiers are used in amplified nodes such as hub nodes, amplified OADM nodes, and line 
amplifier nodes. There are two forms of amplifiers, the Optical Preamplifier (OPT-PRE) and the Optical 
Booster (OPT-BST) amplifier. The optical amplifier card architecture includes an optical plug-in module 
with a controller that manages optical power, laser current, and temperature control loops. The amplifier 
also manages communication with the TCC2 or TCC2P card and OAM&P functions such as 
provisioning, controls, and alarms.

Optical amplifiers have a linear power feature that enables them to be kept in the constant gain mode. 
The OPT-BST gain range is 5 to 20 dB in constant gain mode and output power mode. In constant power 
mode, automatic power control (APC) requirements change. The change occurs because span loss 
degradation does not effect the system, and amplifiers cannot automatically modify the output power for 
variations in the number of channels when a failure occurs.

 shows the card faceplate, 

 shows a block diagram of the card, and 

 shows an 

optical module functional diagram of the OPT-BST card.