User's Manual
Table Of Contents
- 1.Safety Precautions
- 2.System Description
- 2.1About This Manual
- 2.2Introduction
- 2.3System Features
- 2.4Physical Description
- 2.5System Description
- 2.6Consecutive Point Architecture
- 2.72 + 0 (East-West) Configuration
- 2.8Spanning Tree Protocol (STP)
- 2.91+1 Protection
- 2.101 + 1 Multi-hop Repeater Configuration
- 2.11Data Interfaces
- 2.12Crosspoint Switch
- 2.13Power Management
- 2.14Event-HD Software and Network Management
- 2.15System Loopbacks
- 3.Installation
- 3.1Unpacking
- 3.2Notices
- 3.3PRE-INSTALLATION NOTES
- 3.4Back-to-Back Bench Testing
- 3.5Overview of Installation and Testing Process
- 3.6Site Evaluation
- 3.7Installation of the Event-HD
- 3.8Quick Start Guide
- 3.9SDIDU™ Service
- 4.Summary Specification
- 5.Rear Panel Connectors
- 5.1DC Input (Power) Connector
- 5.2Ethernet 100BaseTX Payload Connector 1-2
- 5.3SONET Payload Connector
- 5.4STM-1 Payload Connector
- 5.5DVB/ASI, DS-3, E-3, STS-1 Payload Connector
- 5.6NMS 10/100BaseTX Connector 1-2
- 5.7Alarm/Serial Port Connector
- 5.8ODU Connector
- 5.9T1/E1 - Channels 1-2 Connector
- 5.10T1/E1 - Channels 3-16 Connector
- 5.11USB
- 5.12Voice Order Wire
- 5.13Data Order Wire
- 6.Appendix
22 2. System Description
Connected to
east modem
Connected to
west modem
Connected to
east modem
Connected to
west modem
Connected to
west modem
Connected to
east modem
Connected to
west modem
Connected to
east modem
Figure 2-8. 2 + 0 (East West) Configuration
2.8Spanning Tree Protocol (STP)
Spanning Tree Protocol (STP) keeps Ethernet loops from forming in a ring architecture.
Without STP, loops would flood a network with packets. STP prevents loops by creating
an artificial network break. In the event of a network outage, STP automatically removes
the artificial break, restoring connectivity.
2.91+1 Protection
The Event HD supports 1+1 protection as an option for a critical link. In this
configuration, protection is provided in a single 1 RU chassis. The SDIDUTM contains two
power supplies and two modems. The power supply, ODU, IF/telemetry and modem are
protected. The digital framing and LIUs are not. One modem is referred to as the west
modem and the other as the east modem. 1+1 protection can be run in two modes called
Protected Non-Diversity and Protected Diversity.
2.9.1Protected Non-Diversity (Hot Standby)
Figure 2-9 shows operation in Protected Non-Diversity mode, also called Hot Standby. In
this mode, one ODU at each location transmits to two ODUs at the other location. This
© 2007 Moseley, Inc. All Rights Reserved. 602-14886-01, Rev. A