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City-Netek CN-1108, Руководство по установке и настройке

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CN-1108 Setup and Installation Manual 

                                                                                                                                               

                                                                                                                        19 

13.  TROUBLESHOOTING 

 

This section covers some common problem areas, also known fixes and 

solutions.  Although the solutions offered in this section should solve your 
problem, occasionally a problem might arise that takes on a symptom of an issue, 
hence cannot be solved in the same fashion.    If you are unable to fix the problem 
after going through this section, contact your vendor technical support for 
assistance. 

 
 

Cross Talk Noise:    Can Include Collisions and Link On/Off 

 
Cross Talk Noise can be generated by HomePNA signals of bundled pairs 

of telephone wire.    When two pairs are adjacent to each other, or twisted around 
each other they can create cross talk noise.    A significant amount of cross talk 
noise can be generated on the HPNA switch due to the high power output of the 
switch.  Therefore, when telephone pairs are close together and twisted at the 
switch, the adjacent port may suffer from above problem. 

 
Available solutions for this issue are: 
 
1.

 

Use Cat. 5 certified cables between the MDF and switches, 
including Cat. 5 punchdown blocks and shielded/booted RJ-11 
connectors going into the switch. 

2.

 

Turn on the Auto Noise Leveling Feature 

3.

 

Make manual adjustments if previous solutions failed.    Manual 
adjustments are covered in the “Auto Noise Level Feature” 
chapter. 

 

Reflection Noise:    Caused by Un-Terminated Phone Jacks

 

 

HPNA uses Frequency Division Multiplexing to allow simultaneous flow 

of data and voice services on same pair of wires.    For this reason, your phone 
lines also act as data transmission lines for the frequency range of 5.5 MHz to 9.5 
MHz.    Therefore, if there is any open jack at the end of the circuit in HPNA port, 
the frequency information (data) will have nowhere to go, and reflect back into 
the system, causing noise and non-function. 

 
Solution: 
 
Terminate those jacks using a CN-Terminator or one of its specifications.     

Otherwise, remove the excess jacks from the circuit.     

 

Содержание CN-1108

Страница 1: ...CN 1108 8 Ports 1 Mbps HomePNA 1 Port 10 100 Base TX Ethernet Switch Setup and Installation Manual Version 2 0 ...

Страница 2: ...TACK UP 6 4 3 STACK MOUNTING 6 4 4 CABLE SELECTION 6 5 LED INDICATORS 7 6 CN 1108 CONNECTION 8 7 CONSOLE PORT SETUP 9 8 ICD COMMAND INDEX 10 9 SETTING VLAN FUNCTIONALITY 11 10 AUTO NOISE LEVEL FEATURE 12 11 HIGH LOW POWER MODE 14 12 FREQUENTLY ASKED QUESTIONS FAQ 15 12 1 HPNA 15 12 2 SWITCH 15 12 3 LAN 17 12 4 WAN 18 12 5 PBX 18 13 TROUBLESHOOTING 19 14 CN 1108 FACTORY DEFAULT 21 CONTACT INFORMATI...

Страница 3: ...nctions in the event of a power loss or other interruption Information printed within this guide is subject to change at any time without notice All specifications and parameters including commands are subject to change without notice Some information in this guide is acquired from the World Wide Web All photographs text and diagrams within this publication are the sole property of City Netek Inc ...

Страница 4: ...ng wiring system using current Cat 3 RJ 11 installations Some highlights of the CN 1108 include Supports security with port based VLAN function Auto Noise Leveling Automatic Manual Eight 1Mbps HPNA Ports One 10 100 Mbps Base TX Ethernet Ports One Console Port for CN 1108 unit Easy installation no new wire required inside the building Easy to use menu system and command interface HomePNA and Ethern...

Страница 5: ... negotiation IEEE 802 3 802 3u LED Link Activity 10 100 Full Duplex Collision z One 1 Console Port Baud Rate 19200 bps 8 Data Bits 1 Stop Bit No Parity No Flow Control Console Management Command Local Mode z Physical Specifications AC Input 100 250 VAC 47 63 Hz Internal Universal Power Supply Power Consumption 12W Max Operating Temp 0 50 C Storage Temp 25 70 C Humidity 10 90 Non Condensing Certifi...

Страница 6: ...rews For Shelf or Rack Install If any of these items are missing please contact your vendor immediately before continuing For additional manuals or mounting feet please contact your vendor Before removing the switch unit from the package please be sure to remove all static devices and static electricity from your body by touching an available metal plate or grounding point Your new CN 1108 has eig...

Страница 7: ...and surface for better airflow Once feet are installed onto the switch unit allow for a clearance of at least 5 inches from rear to wall and 1 2 inches on each side for adequate airflow 4 3 STACK MOUNTING Use the diamond shaped stackable mounts to attach to CN units together from the sides Simply apply the diamonds to each side using the included screws to the upper holes on the bottom device and ...

Страница 8: ...rnet Port On The Ethernet port is linked Blinking The Ethernet port is sending or receiving data LNK ACT Ethernet Port Active Green Off Port is not connected On The speed is at 100Mbps 10 100 Ethernet port Transmit And Receive Speed Green Off The speed is at 10Mbps On Port is operating at full duplex Blinking Transmission collisions have occurred on the Ethernet port FDX COL Full Duplex Transmissi...

Страница 9: ...ion shows the CN 1108 and a description of its ports Workstation Workstation Workstation EIA 232 CN 1108 XTLK VLAN SNMP ALARM RESET 0 1 2 3 ID POWER LNK ACT 100 10 FDX COL NORMAL UPLINK 5 6 7 8 LNK ACT COL 1 2 3 4 LNK ACT COL Server Cat 5 Cable Workstation Workstation Figure 1 ...

Страница 10: ...malfunction to the equipment Once you have connected the module to your console port start any terminal program such as HyperTerminal by Hilgraeve Software in Windows 98 Once you have started your terminal application you will need to set the terminal with the following settings Also note that this switch can be used with a dumb terminal that has a DB 9 serial type port installed If using a dumb t...

Страница 11: ...N Off VO VLAN On V Display VLAN Status P Display Status of All Ports PD Disable given port only for HPAN Port PE Enable given port only for HPNA Port C Clear Packet Counters of All Port Counter or Given Port PC Display Transmit Receive Collision Counters in Hex of given port or all ports when port number is not enter U Display Unit Information S Save Data RS Reset Unit RSW Restore MIB Agent Factor...

Страница 12: ...arise for sharing of files collaboration software faster multi player gaming etc Activating the VLAN function allows each port to be individualized and non communicative to the other ports on the switch in regards to local traffic Deactivating VLAN allows the switch to act as a normal Ethernet HPNA Switch by passing along multicast and broadcast traffic to each port Disabling this feature would be...

Страница 13: ...lly caused by surrounding noise lines or bad wirings high impedance Signs of trouble with the noise floor would indicate by excessive collisions on the affected port or loss of link status with a sudden gain in status Noise level threshold can be adjusted manually through console by changing the register value Register 25 is to record the setting of noise level while register 23 is to write change...

Страница 14: ...e Noise Control Register will be set to 1A to avoid cross talk noise But in some reflection signal noise case the normal signal has been cancelled by the reflection signal original from the real signal So the peak signal may be only 8 to 10 So the Noise floor has to be set to about 5 For example Please refer to Figure A port 1 value is PC01R23 0CFF the noise level is 0C to change this value form 0...

Страница 15: ...the following side effects I High Power Mode will cause much more Cross Talk within the line of the port modified II Data Rate may be slightly affected by raising the power mode resulting in slower transmission To adjust to high power mode use the following command WP R16H0505 This will change the value of register 16 from 0005 hex default to 0505 hex By reading back the register 17 the value shou...

Страница 16: ...e switch through telnet at once A Telnet and Console only accept only 1 connection at a time and Telnet and Console cannot be access at the same time Q Can I turn off ports individually A Yes Use the Console or Http Interface to do so Q Can I adjust bandwidth per port A No you cannot change the throughput thresholds Q Will the switch ever get too busy to handle large volumes of data A No with the ...

Страница 17: ... Q I am using my CN 1108 for my office network I cannot see the file sharing computer Is there something wrong with my switch A Not at all just set the VLAN function to OFF and all ports will be able to communicate with one another Q Is the 1Mb of speed per port or for the whole backplane A The ports are capable of 1Mb full duplex max throughput per port the back plane can handle vast amounts of t...

Страница 18: ... transmission require A One pair Q Which pair runs the data in a 2 pair RJ 11 A It will run on either pair just be sure that both ends of the cable have the same wiring configuration Q Can I use Cat 5 Cable to make 4 RJ 11 connections A Yes Q Will other types of HPNA CPE Customer Premises Equipment work with the CN 1108 A Yes however all Manufacturers do not guarantee the performance of their prod...

Страница 19: ...w do I get through remotely to my switch to monitor and change settings A In your firewall you should have a private connection tunneling feature to allow direct connections between addresses on your network and out of band workstations Refer to your Router User Manual 12 5 PBX Q Will the switch work with all PBXs A Yes your CN 1108 will work with all analog PBXs and most Digital systems however n...

Страница 20: ...se together and twisted at the switch the adjacent port may suffer from above problem Available solutions for this issue are 1 Use Cat 5 certified cables between the MDF and switches including Cat 5 punchdown blocks and shielded booted RJ 11 connectors going into the switch 2 Turn on the Auto Noise Leveling Feature 3 Make manual adjustments if previous solutions failed Manual adjustments are cover...

Страница 21: ...tall an impedance matching filter to correct the frequency domain shift Depending on the frequency domain type of PBX and amount of impedance shift a filter may be needed between the PBX and the MDF or the CPE and Telephone set equipment Contact City Net for information on impedance matching and installation of CN Filter and CN Tester kits Standard Ethernet Frame Dropping The CN 1108 will discard ...

Страница 22: ...CN 1108 Setup and Installation Manual 21 14 CN 1108 FACTORY DEFAULT MIB Agent Factory Default Auto Noise Level Adjustment ON Power and Speed Mode Low Power High Speed V LAN ON ...

Страница 23: ...rial Park Hsin Chuang City Taipei Hsien Taiwan R O C TEL 886 2 2299 2595 Fax 886 2 2298 1126 Http www citynetek com tw E Mail sales citynetek com tw City Net Technology Inc 135E Chestnut Ave Suite 9B Monrovia CA 91016 U S A TEL 1 626 599 8556 Fax 1 626 599 8557 Http www citynetek com E Mail sales citynetek com ...

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