User manual ZYXEL VES.1012 12PORT VDSL-SWITH

[. . . ] VES-1000 Series VDSL-Ethernet Switches May 2002 Version 3. 40 User's Guide VES-1000 Series Ethernet Switch Copyright Copyright © 2002 by ZyXEL Communications Corporation The contents of this publication may not be reproduced in any part or as a whole, transcribed, stored in a retrieval system, translated into any language, or transmitted in any form or by any means, electronic, mechanical, magnetic, optical, chemical, photocopying, manual, or otherwise, without the prior written permission of ZyXEL Communications Corporation. All rights reserved. Disclaimer ZyXEL does not assume any liability arising out of the application or use of any products, or software described herein. Neither does it convey any license under its patent rights nor the patents rights of others. ZyXEL further reserves the right to make changes in any products described herein without notice. [. . . ] Lower 32-bit count of the number of received octets of data (including those in bad frames). Upper 32-bit count of the number of transmitted octets of data (including those in bad frames). Lower 32-bit count of the number of transmitted octets of data (including those in bad frames). This is the number of frames received that were less than 64 octets long and with either a CRC error or an alignment error. This is the number of frames received that were greater than the maximum octets (specified for the system by the configuration software) long and with either a CRC error or an alignment error. This is the number of frames received that were of the proper size but with a CRC error and non-integral number of octets. This is the number of frames received that were of the proper size but experienced symbol error during frame reception. This is the number of good frames that were dropped because the violation of the switch security rules. This is the number of good frames that were dropped because the specified destination port does not belong to the VLAN domain. This is the number of frames received that were less than 64 octets long and without any CRC or alignment errors. This is the number of frames received that were greater than the maximum octets (specified for the system by the configuration software) long and without any CRC error or alignment errors. This is the number of frames transmitted that were greater than the maximum octets (specified for the system by the configuration software) long and without any CRC or alignment errors. DESCRIPTION RxAlignErrors RxSymbolErrors SecurityDrops VLANDrops UndersizedPkt OversizedPkt TxOversizePkt VDSL Upstream/Downstream status Constellation Constellation shows the modulation method and speed. The constellations are QAM 4, QAM 8, QAM 16, QAM 64, QAM 256 where QAM (Quadrature Amplitude Modulation) defines how many bits there are per symbol; for example QAM 4 means 2 bits per symbol (22), QAM 8, 3 bits (23) per symbol and so on. It is equal to 25. 0MHz / baud rate, so for example, Int 8 = 25. 0 / 8 Mbaud. Rate Fc SNR This is the VDSL raw speed. This is the carrier frequency The higher the SNR (Signal-to-Noise Ratio) number, the better. SNR (Signal-to-Noise Riih i fh li d f h d i d i l h li d f i i l System Maintenance 1 9-5 VES-1000 Series Ethernet Switch Table 9-B Port Statistics FIELD DESCRIPTION Ratio is the ratio of the amplitude of the desired signal to the amplitude of noise signals at a given point in time. The minimum mean-square error (also known as MMSE) performance measure is a popular metric for optimal signal processing. Reed-Solomon codes are block-based error correcting codes and are used to correct errors in many systems including This is the Power Spectrum Density. This is a VDSL Disconnect counter. 9. 2. 2 Spanning Tree Protocol Status Verify STP status in this menu. Step 4. Step 6. Enter 24 from the main menu to go to Menu 24 ­ System Maintenance. Enter 2 to open Menu 24. 1. 2 -- System Maintenance -- Spanning Tree Protocol Status. Menu 24. 1. 2 - Spanning Tree Protocol Status Spanning Tree Protocol= Running Root Bridge: Bridge ID: 8000-00a0c5451da7 Cost to Bridge: 0 PortID: 0X0000 Hello Time(Time (sec): 2 Max Age(Age (sec): 20 Forward Delay(Delay (sec): 15 Topology: Change Times: 0 Time Since Last Change: Our Bridge: Bridge ID: 8000-00a0c5451da7 Hello Time(Time (sec): 2 Max Age(Age (sec): 20 Forward Delay (sec): 15 0:00:16 Press ESC to return: Figure 9-5 Menu 24. 1. 2 - Spanning Tree Protocol Status Table 9-C Menu 24. 1. 2 - Spanning Tree Protocol Status FIELD Spanning Tree Protocol Root Bridge Bridge ID Cost to Bridge DESCRIPTION This field shows if the switch is enabled to participate in an STP-compliant network. [. . . ] 10-8 Upstream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 USER port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 User's Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1 V VDSL User Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]