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NTRODUCTION
NBX 100 Quality of Service
Quality of Service (QoS) is a way to allocate resources in data switches
and routers so that data can be prioritized, with the most time-critical
data receiving higher priority. At Layer 2, the NBX 100 supports Ethernet
802.1Q, “Standard for Virtual Bridged Local Area Networks,” and its
associated specification, 802.1p, “Standard for Local and Metropolitan
Area Networks, Supplement to Media Access Control (MAC) Bridges:
Traffic Class Expediting and Dynamic Multicast Filtering.” These IEEE
Ethernet standards define how Ethernet packets can be prioritized.
At Layer 3, the NBX 100 supports IP Precedence, also called IP Type Of
Service (ToS, to specify the class of service for each packet. The NBX 100
also supports and allows you to configure settings for the emerging
Differentiated Services technology, which defines prioritizing over the
WAN.
Low-bandwidth Connections
You can configure a telephone to function as a low-bandwidth device or
to use ADPCM Audio Only so that it can operate over links that have
bandwidth as low as 56 Kbps, such as a single B channel of a PRI ISDN
line. A low-bandwidth telephone offers a minimum feature set. For
example, paging, conferencing, and music-on-hold are not available over
a low-bandwidth link.
Summary of Contents for NBX 100
Page 1: ...http www 3com com NBX 100 Installation Guide Release 2 8 Part No 900 0026 01 November 2000 ...
Page 12: ......
Page 18: ...18 ABOUT THIS GUIDE ...
Page 128: ...128 CHAPTER 2 CONFIGURING THE DIAL PLAN ...
Page 196: ...196 CHAPTER 4 CONFIGURING NBX 100 SYSTEM LEVEL SETTINGS ...
Page 238: ...238 CHAPTER 6 SETTING UP USERS AND FEATURES 6 Click Apply to effect the changes 7 Click OK ...
Page 268: ...268 CHAPTER 7 CONFIGURING DIGITAL LINE CARDS T1 E1 AND BRI CARDS ...
Page 286: ...286 APPENDIX A NBX 100 SYSTEM SPECIFICATIONS ...
Page 290: ...290 APPENDIX B T1 AND ISDN PRI SERVICES CIRCUIT PROVISIONING ...
Page 294: ...294 APPENDIX C GUIDELINES FOR REMOTE AUDIO DEVICE CONNECTIONS ...
Page 306: ...306 INDEX ...