Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for ZyXEL Communications P841C
Summary of Contents for ZyXEL Communications P841C
- Page 1 P841C Central-Side VDSL Modem May 2002 Version 1.00 User’s Guide...
- Page 2 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.
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Page 3: Zyxel Limited Warranty
P841C Central-Side VDSL Modem ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to two (2) years from the date of purchase. During the warranty period and upon... -
Page 4: Interference Statements And Warnings
P841C Central-Side VDSL Modem Interference Statements and Warnings FCC Interference Statement This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference. (2) This device must accept any interference received, including interference that may cause undesired operations. -
Page 5: Customer Support
If you have questions about your ZyXEL product or desire assistance, contact ZyXEL Communications Corporation offices worldwide, in one of the following ways: Contacting Customer Support When you contact your customer support representative, have the following information ready: Product model and serial number. -
Page 6: Table Of Contents
Copyright ...ii ZyXEL Limited Warranty...iii Interference Statements and Warnings ...iv Customer Support ... v Preface ...ix Chapter 1 Getting to Know the P841C... 1-1 Features... 1-1 Application Example ... 1-1 Chapter 2 Hardware Connections... 2-1 Front Panel ... 2-1 Back Panel... 2-1 Chapter 3 Configuring the P841C ... - Page 7 P841C Central-Side VDSL Modem List of Figures Figure 1-1 Campus Application ...1-2 Figure 2-1 P841C Front Panel...2-1 Figure 2-2 P841C Back Panel ...2-2 Figure 3-1 Login Screen...3-1 Figure 3-2 Login Screen...3-1 Figure 3-3 Wrong Password ...3-2 Figure 3-4 Change Password Command ...3-2 Figure 3-5 Exit Command...3-3...
- Page 8 P841C Central-Side VDSL Modem List of Tables Table 2-1 P841C LED Descriptions... 2-1 Table 2-2 P841C Rear Panel Connectors ... 2-2 Table 3-1 P841C Help Commands... 3-4 Table 3-2 Sys Status Command ... 3-5 Table 4-1 VDSL Default Values... 4-1 Table 4-2 VDSL Mode ...
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Page 9: Preface
For brevity’s sake, we will use “e.g.” as shorthand for “for instance”, and “i.e.” as shorthand for “that is” or “in other words” throughout this manual. • The Prestige 841C may be referred to as the P841C throughout this manual. Related Documentation ZyXEL Web Site The ZyXEL web site at www.zyxel.com contains an online glossary of networking terms and a download library... -
Page 11: Chapter 1 Getting To Know The P841C
This chapter describes the key features, benefits and applications of your P841C. The P841C is a VDSL Line Termination (LT) modem that is the perfect partner for the P841 VDSL subscriber modem. It maps traffic from one VDSL (Very high bit rate Digital Subscriber Line) subscriber to one 10/100M Ethernet that connects to a computer or LAN switch. -
Page 12: Figure 1-1 Campus Application
P841C Central-Side VDSL Modem Figure 1-1 Campus Application Getting to Know the P841C... -
Page 13: Chapter 2 Hardware Connections
2.1 Front Panel The following figure shows the front panel of the P841C. 2.1.1 Front Panel LEDs The following table describes the LED indicators on the front panel of the P841C. COLOR STATUS Green LAN 10 M Green Blinking LAN 100 M... -
Page 14: Figure 2-2 P841C Back Panel
The CONSOLE port is an RS-232 port for configuration of the P841C. Connect the male 9-pin end of the console cable to the console port of the P841C. Connect the other end (either a female 25-pin or female 9-pin) to a serial port (COM1, COM2 or other COM port) of your computer. -
Page 15: Configuring The P841C
3.2 Login Screen When you turn on your P841C, it performs several internal tests as it initializes. A login screen appears with copyright and VDSL information prompting you to enter the password, as shown in the next figure. You need a password to configure the P841C. -
Page 16: Commands
General Command Conventions References to “LT” and “NT” are common throughout the commands. “LT” means means Line Termination (unit), which is the P841C VDSL central office side modem. “NT” means Network Termination (unit), which is the subscriber’s VDSL modem (P841). -
Page 17: Figure 3-5 Exit Command
Enter this command to log out. You will then have to re-enter your password to log in again. System Timeout Please note that if there is no activity for longer than five minutes after you log in, your P841C will automatically log you out. When you are logged out, press [ENTER] to bring up the password prompt. -
Page 18: Table 3-1 P841C Help Commands
This command causes the P841C to load new VDSL modem code into LT (P841C) or NT (P841). If LT is specified, the P841C will load the VDSL modem code into the VDSL chip. If NT is specified, P841C will load the VDSL modem code into the P841 VDSL chip. -
Page 19: Figure 3-7 Sys Status Command
FIELD enet speed (lt|nt) Type this command to set the Ethernet port speed of the P841C (you must type “lt”) or P841 (speed) (“nt”). P841C speed is displayed if you just type “enet speed”. enet fctrl (lt|nt) Type this command to set the Ethernet port full duplex flow control of the P841C (you must [on|off] type “lt”) or P841 (“nt”). -
Page 20: Figure 3-9 Upgrade Firmware Last Warning
P841C Central-Side VDSL Modem You MUST NOT abort this operation after XMODEM data transfer begins. Otherwise the device will be damaged. Restart your device before XMODEM transfer begins to quit the upgrade process. Figure 3-9 Upgrade Firmware Last Warning Launch your terminal emulation program (see next example). You should have already downloaded the Step 4. -
Page 21: Vdsl- Related Commands
4.1 Introduction VDSL-related commands supported by the P841C are shown in Table 3-1.The default values for the following VDSL parameters are: VDSL PARAMETER VDSL Mode VDSL Active VDSL Upstream Rate VDSL Downstream Rate 4.1.1 VDSL Mode Command This command displays the VDSL mode if you don’t type a mode and sets it if you do. Use the “vdsl reset” or “vdsl recon”... -
Page 22: Figure 4-2 Vdsl Upstream Rate
3.0M 4.17 6.25 5.0M 1.56 3.13 2.7M 4.17 6.25 vdsl active [on|off] vdsl uprate [uprate] P841C>vdsl uprate vdsl upstream rate: 1562500 bps (0) Figure 4-2 VDSL Upstream Rate vdsl downrate [downrate] RATE (Mbps) 9.38 12.50 18.75 8.33 12.50 16.67 6.25 8.33... -
Page 23: Figure 4-3 Vdsl Downstream Rate
This command turns the VDSL auto flag on or off. Type vdsl auto to show the current VDSL auto flag status (without “on” or “off”). When this flag is on, the P841C automatically negotiates upstream and downstream rates up to the values set using the upstream and downstream commands just described. -
Page 24: Figure 4-5 Vdsl Status Example
This command makes the P841C loads new VDSL modem code into the P841C (LT) or P841 (NT). If “LT” is specified, the P841C will load the VDSL modem code into the P841C. If “NT” is specified, the P841C will load the VDSL modem code into the P841. -
Page 25: Table 4-5 Vdsl Status Counters
This command turns the VDSL auto flag on or off or just shows the current VDSL auto flag status (without “on” or “off”). When this flag is on, the P841C displays each stage (state) of the VDSL link initialization process. -
Page 26: Figure 4-6 Vdsl Initialization Messages
P841C> vdsl monitor on P841C>124:US 18.75M SNR 31.85dB RSERR 0 DS 16.67M SNR 41.08dB RSERR 0 DISC 0 127:US 18.75M SNR 31.89dB RSERR 0 DS 16.67M SNR 41.30dB RSERR 0 DISC 0 130:US 18.75M SNR 31.92dB RSERR 0 DS 16.67M SNR 41.27dB RSERR 0 DISC 0 133:US 18.75M SNR 31.78dB RSERR 0 DS 16.67M SNR 40.97dB RSERR 0 DISC 0... -
Page 27: Figure 4-8 Vdsl Show Command
This field shows the current VDSL monitor flag status ( “on” or “off”). When this flag is on and the VDSL link is up, the P841C will automatically VDSL parameters every three seconds. For more information, see the VDSL monitor command. - Page 28 Type this command to show the VDSL auto upgrade status (without “on” or “off”) or turn on/off auto upgrade. When auto upgrade is on, the P841C will check the subscriber’s modem VDSL modem code version and automatically upgrade it if it is an earlier version than the P841C’s.
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Page 29: Ethernet-Related Commands
If the peer Ethernet port does not support auto-negotiation or turns off this feature, the P841C determines the connection speed by detecting the signal on the cable and using half duplex mode. When the P841C’s auto-negotiation is turned off, an Ethernet port uses the pre-configured speed and duplex mode when making a connection, thus requiring you to make sure that the settings of the peer Ethernet port are the same in order to connect. -
Page 30: Figure 5-1 Ethernet Status
Type this command to display P841C and the subscriber’s VDSL modem’s Ethernet statistics (if link is up). P841C>enet status LT PHY: LSI 80225 LT Ethernet speed: Link Down! LT Ethernet Counters: ALGM_ERR = 0 SINGLE_COL = 0 LATE_COL = 0... -
Page 31: Figure 5-2 Ethernet Speed
Type this command to clear P841C and the subscriber’s VDSL modem’s Ethernet statistics (if link is up). 5.1.3 Enet Speed (lt|nt) (speed) Command Type this command to set the Ethernet port speed of the P841C (with “lt”) or P841 (with “nt”). P841C speed is displayed if you just type “enet speed”. 5.1.4... -
Page 32: Figure 5-4 Ethernet Monitor Status
When this flag is on this command automatically displays the P841C (and the subscriber’s VDSL modem’s Ethernet statistics if the link is up) every five seconds. Enter the command without “on” or “off” to just show the Ethernet monitor status. -
Page 33: Chapter 6 Troubleshooting
Use the VDSL commands to reset and reconnect the VDSL channel (see sections 4.1.6 and 4.1.7). Connect the VDSL modem or router to another P841C (VDSL port). If the VDSL modem or router works with a different P841C, then there may be a problem with the original P841C. Contact the distributor. -
Page 34: Intermittent Vdsl Led
Table 6-3 Troubleshooting a Non-Constant VDSL LED STEPS Disconnect the phone wire coming from the VDSL port of the P841C and connect the subscriber’s VDSL modem or router directly to the VDSL port of the P841C using a different telephone wire. - Page 35 Flow control: On for full duplex and off for half-duplex If the P841C’s auto-negotiation is turned off, an Ethernet port uses the pre-configured speed and duplex mode when making a connection, thus requiring you to make sure that the settings of the switch Ethernet port are in the same order to connect.
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Page 37: Power Adapter Specifications
Power consumption: 6 W Safety standards: TUV, CE (EN 60950, BS7002) AUSTRALIA AND NEW ZEALAND AC Power Adapter model AD-1201200DS or AD-121200DS Input power: AC240Volts/50Hz/0.2A Output power: DC12Volts/1.2A Power consumption: 6 W Safety standards: NATA (AS 3260) P841C Central-Side VDSL Modem... -
Page 39: Index
10 Base-S ...4-8 10Base-S ...4-7, 4-9 10Base-S Mode ...1-1 ALGM_ERR ...5-2 ANSI Mode ...1-1 ANSI/ETSI Plan 998...4-8 Back Panel...2-1 Band plan ...4-7 BCF ...5-2 CE... iv Certification ... iv Class B ... iv CONSOLE ...2-2 Contacting Customer Support ... v Copyright ... - Page 40 MSE...4-11 MUL_COL ...5-2 Network Interface Card ...3-1 NIC ... See Network Interface Card NT (Network Termination ...3-2 ORO ...5-2 OTO...5-2 P841...1-1 P841C ...ix Passwd ...3-2 Password... 3-1, 3-2, 6-2 PHONE...2-2 POCO ...4-11 POWER...4-11 Power Adapter ... A PSD ...4-11 PWR ...2-1 Rear Panel Connections Rear Panel ...
- Page 41 TXBCNT...5-2 TXPAUS...5-2 TXPWR... 4-11 US... 4-11 VDSL ...1-1 VDSL ... ix vdsl active ... 3-2, 3-4, 4-8 vdsl debug ... 3-2, 3-4, 4-11, 4-13 vdsl downrate ...3-4 VDSL LED...6-1 Index vdsl mode ... 3-4, 4-7, 4-13 VDSL Mode ...4-7, 4-8 VDSL Modes ...