C
G
UIDELINES
FOR
R
EMOTE
A
UDIO
D
EVICE
C
ONNECTIONS
This appendix provides guidelines for connecting a remote audio device
to the NBX
®
100 system. The remote audio device can be an Business
Telephone, Analog Line card, Single-Port Analog Terminal Adapter (ATA),
Digital Line card, or other product.
The guidelines provided are for a single device, but the issues discussed
can be scaled to cover multiple devices. The guidelines include the
following topics.
■
Maximum Transfer Unit (MTU)
■
Communication Latency Requirements
■
Bandwidth Requirements
■
Installing Fax Devices with ATAs
Maximum Transfer
Unit (MTU)
The system requires that the interconnection mechanism provide an
apparent MTU of a full size IEEE 802.1 packet (1514 bytes of information
plus 4 byte CRC). The interconnection can fragment packets into smaller
frames but
must
reassemble the packets prior to delivery to any NBX 100
device. The NBX 100 devices do not presently support IP (or other) packet
fragmentation and reassembly.
Communication
Latency
Requirements
The interconnect latency requirements can be broken into two main
categories: large packet latency and small packet latency. Depending on
the configuration of the interconnection mechanism, these latencies can
be quite different, often due to the interconnection device applying
compression to the packets. The compression function can increase
exponentially with packet size, resulting in very long delays for large
packets.
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 ...