Gateway Series Installation Manual
Table Of Contents
- Cover
- Notice
- Contents
- About This Manual
- Translations
- Customer Information
- Chapter 1, About the Vanguard 3400 Series
- Chapter 2, Hardware Description
- Overview
- Enclosure
- Motherboard
- Vanguard Networks Daughtercards
- Supported Daughtercards
- Daughtercard Compatibility
- Figure 2-6. New Vanguard 3400 Series Daughtercard Example
- Figure 2-7. 56K DSU/CSU Daughtercard Connector
- Figure 2-8. FT1 and FE1 Daughtercard Connectors
- Figure 2-9. Dual E&M Daughtercard Connectors
- Figure 2-10. FXS Daughtercard
- Figure 2-11. FXO Daughtercard
- Figure 2-12. V.90 Modem Daughtercard Connectors
- Chapter 3, Installation and Replacement
- Overview
- Checking Your Shipment Contents
- Installing The Vanguard 3400 Series
- Modifying Your Vanguard 3400 Series
- Chapter 4, Powering Up Your Vanguard 3400 Series
- Appendix A, Specifications
- Appendix B, Software License and Regulatory Information
- Return Procedures
- Index

3-6 Installation and Replacement
Installing The Vanguard 3400 Series
Thermal Considerations
Introduction This section explains some of the heat and temperature factors that can affect your
Vanguard 3400 Series.
Temperature After the unit is running, check the ambient air temperature. Make sure it does not
exceed the operating temperature limits specified in Appendix A.
Other conditions that could impact internal temperature of the Vanguard 3400 Series
include:
• Blocked vents
• Insufficient clearance around the unit
• Fan (if this unit is provided with one) is not working properly
• Rubber feet (4) not installed on bottom of chassis










