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. Published by 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. [. . . ] Int (Interpolation) defines how fast the symbols go through the line. 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. MSE RS_ERR PSD DISC Minimum Square Error. 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 1 to open Menu 24. 1 ­ System Status. 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. The following six fields relate to the root bridge. This is a unique identifier for this bridge, consisting of bridge priority plus MAC address. This is the cost for a packet to travel to the root in the current Spanning Tree configuration. The slower the media, the higher the cost. This is 0 if your bridge is the root device. 9-6 System Maintenance 1 VES-1000 Series Ethernet Switch Table 9-C Menu 24. 1. 2 - Spanning Tree Protocol Status FIELD Port ID DESCRIPTION This is the index of the port on this switch that is closest to the root. This switch communicates with the root device through this port. This is 0X0000 if your bridge is the root device. This is the time interval (in seconds) at which the root device transmits a configuration message. This is the maximum time (in seconds) a device can wait without receiving a configuration message before attempting to reconfigure. This is the time (in seconds) a device will wait before changing states. The following four fields relate to your device. [. . . ] 1-3 VDSL Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 VDSL Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 VDSL Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3 VDSL-related CI commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]