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7996 SHDSL NTU User’s Guide 

Chapter 7   Troubleshooting 

Event Checking 

Procedure 

VT100 connection 
failure 

1.  Check the RS-232 connection. 
2.  Check the RS-232 cable. A straight-through cable is 

required. 

3.  Check the terminal emulation program. It must be 

VT100-compatible. 

4.  Check console session parameters. The default baud rate 

is 38400. 

Login deny 

1. Password incorrect.  
2. Incorrect capitalization. The password is case-sensitive.  

No LED display 

Check the power connection. 

No Response from 
LAN port 

1. Check network connection. 
2. Check SNMP configuration. 

DSL Training failure 
or the training period 
has exceeded three 
minutes 

1. 

Reboot the device and retrain

. 

2.  Check the status of the DSL LOS LED. If this LED keeps 

blinking for over three minutes (meaning the device 
cannot train), then the line quality is poor, or the link 
distance is too long for the device to train. Contact your 
service provider.  

 
 
 
 

44                                                                                   September

 

2004                                                         7996-A2-GB21-00 

Summary of Contents for Hotwire 7996

Page 1: ...7996 A2 374 SHDSL G 703 NTU User s Guide Document Number 7996 A2 GB21 00 September 2004...

Page 2: ...ld Wide Web site at www paradyne com Be sure to register your warranty at www paradyne com warranty Telephone Call our automated system to receive current information by fax or to speak with a company...

Page 3: ...5 OPERATION MODE 23 5 1 SELECTING DEVICE 24 5 2 SELECTING MODE 25 CHAPTER 6 MAINTENANCE 26 6 1 PERFORMANCE 26 6 2 ALARM MONITORING 33 6 3 LOOPBACK TEST 34 6 4 SYSTEM MAINTENANCE 38 6 5 SYSTEM RESET A...

Page 4: ...formance Screen for SHDSL 27 Figure 6 5 Current Previous 7 Days Performance Screen for SHDSL 28 Figure 6 6 Clear Performance Data Screen for SHDSL 28 Figure 6 7 Current Quarter Performance Screen for...

Page 5: ...net access and Digital Data Network DDN access Featuring remote control capability the local 7996 A2 374 is able to perform configuration performance monitoring querying diagnostics and all maintenanc...

Page 6: ...7996 SHDSL NTU User s Guide 1 3 Applications Figure 1 1 shows the applications of the 7996 A2 374 SHDSL NTU Figure 1 1 Applications of 7996 A2 374 6 September 2004 7996 A2 GB21 00...

Page 7: ...m detected On Loopback testing LB Yellow Off Normal operation On E1 connection is working E1 Green Off E1 connection is not working On Loss of signal DSL link is out of service or not connected Blink...

Page 8: ...ors AC power Interface Description 48V FG PG Power The 48 VDC version has three pins 48V FG PG Fig 2 1 The AC version has a power jack and a power switch Fig 2 2 Console DB9 female connector for conne...

Page 9: ...to the ground of 48VDC power supply source FG Connect to the frame ground For the AC version connect the Power jack to the power cable of the 110 or 220 VAC power adapter After power on for the AC ve...

Page 10: ...or your VT100 terminal emulation program Baud rate 38 400 bps Parity None Data bits 8 Stop bit 1 Flow control None After the session parameters are set up start the VT100 emulator program on the PC Th...

Page 11: ...Configuration Configure system parameters Current Alarm Status Show the status of current alarms Performance Statistics Show the statistics of performance monitoring Threshold Setup Set the day and qu...

Page 12: ...ose Run Type telnet xxx xxx xxx xxx where xxx xxx xxx xxx is the IP address of your SHDSL NTU The default NTU IP address is 172 16 7 37 STEP 3 Refer to Chapters 4 to 6 to configure and maintain the SH...

Page 13: ...rate 38400 bps Parity None Data bits 8 Stop bit 1 Flow control None Run the VT100 emulator program In a while the Press Any Key to Login message appears Press any key When a login prompt appears type...

Page 14: ...ault is LT mode Configuration Configure system parameters Current Alarm Status Show the status of current alarms Performance Statistics Show the statistics of performance monitoring Threshold Setup Se...

Page 15: ...figuration to go to the System Configuration screen shown in Figure 4 3 The following parameters can be configured there Device Name Enter proper characters for system identification The maximum lengt...

Page 16: ...rt Configuration to go to the Local Management Port Configuration screen shown in Figure 4 4 The factory default setting for Baud Rate is 38400 bps Press the Left or Right arrow key to select Baud Rat...

Page 17: ...stem Date and Time Setting to go to the System Date and Time Setting screen shown in Figure 4 5 Figure 4 5 System Date and Time Setting Screen Select Synchronize Remote Date Time to synchronize the sy...

Page 18: ...parameters The parameters for SNMP configuration are explained as the following Node IP Address Specify the IP address for the device The default address is 172 16 7 37 Node IP Subnet Mask Specify a...

Page 19: ...the trap can be sent to the host directly otherwise a gateway must be used Figure 4 7 shows all of the parameters for SNMP configuration The parameters for TFTP configuration are File Server IP Addre...

Page 20: ...will not require such power levels G SHDSL includes a power back off algorithm that enables modems to adjust their transmitting power according to conditions on the line Operators can use this feature...

Page 21: ...SHDSL line rate is shown at the bottom of the screen Figure 4 9 E1 Interface Configuration Screen I Figure 4 10 shows another E1 interface configuration screen when E1 Transparency is disabled from th...

Page 22: ...ursor to the Logout field from the main menu by using the Up or Down arrow key Figure 4 11 System Logout After pressing the Enter key a prompt as shown below will ask you to Press any key to login The...

Page 23: ...m the terminal Figure 5 1 shows how this is indicated WRITE is displayed in the lower right corner of the screen showing the system is managed in Write mode Figure 5 1 Operation Mode Indication Upon f...

Page 24: ...iguration is a little different from that of the local configuration Figure 5 3 shows the fields included in the remote Main Menu Select NE Node Configuration Current Alarm Status Performance Statisti...

Page 25: ...s shown in Figure 5 4 The factory default is LT mode Figure 5 4 Select NE Mode Menu The NT LED on front panel will light when NT is selected NT Mode System timing is not configurable in this mode The...

Page 26: ...r the SHDSL Performance or E1 Performance field on the menu To configure SHDSL performance monitoring choose SHDSL Performance Figure 6 1 Performance Data Menu In both the SHDSL Performance and E1 Per...

Page 27: ...d Update the monitored data immediately by selecting Refresh The parameter Elapsed Seconds represents the time in seconds passed in the current quarter hour The maximum value of the Elapsed Seconds is...

Page 28: ...to update the monitored data Figure 6 5 Current Previous 7 Days Performance Screen for SHDSL Clear the current or history performance data by selecting the Main Menu Performance Statistics SHDSL Perf...

Page 29: ...second with 832 or more PCV error events OR one or more Out of Frame defects SEFS Severely Errored Framing Seconds A second with one or more Out of Frame defects or a detected AIS defect UAS Unavailab...

Page 30: ...data for a particular day Figure 6 8 Previous 96 Quarters Performance Screen for E1 On the Current Previous 7 Days Performance screen shown below the data of the previous seven days and the informatio...

Page 31: ...Two fields can be selected SHDSL threshold and E1 threshold Press the Up or Down arrow key to select SHDSL Threshold Figure 6 11 Threshold Set Menu The threshold is expressed in seconds The valid ran...

Page 32: ...he threshold per quarter hour is from 0 to 900 seconds and the valid range for a day is from 0 to 86400 seconds The threshold of the DM parameter is counted in minutes with the valid quarter hourly th...

Page 33: ...alarms major and minor Use the Up Down arrow key to select field Exit for page exit Refresh for updating data PgUp for page up and PgDn for page down Figure 6 14 Current Alarm Status Screen 6 2 2 View...

Page 34: ...lect Main Menu Test Loopback Status SHDSL Loopback to go to the SHDSL loopback screen Figure 6 17 SHDSL Loopback Screen There are four types of the SHDSL loopback Line loopback To perform a loopback t...

Page 35: ...rt to perform the test To perform the BER Test you have to select a test pattern in the Test Pattern field first Then move the cursor to Start in the Test Switch field and press Enter to start the tes...

Page 36: ...1 loopback screen Figure 6 19 E1 Loopback Screen On the screen there are four fields selectable via the Left Right arrow key and explained below Release Return to normal operation Local Perform an E1...

Page 37: ...rns are available for the test Parameter Normal indicates that there is no pattern sent Test Switch The user has to use the Up Down key to move the cursor to this field and select Start to perform the...

Page 38: ...setting from the Configuration Database Maintenance screen Figure 6 21 Configuration Database Maintenance Menu 6 4 1 Saving Configuration Database Select Main Menu Configuration Database Maintenance S...

Page 39: ...modem protocol for file transfer Enter the file name with the directory to be received Execute the file transfer function Note The maximum wait time for the system is 50 seconds If a timeout message...

Page 40: ...use Select the X modem protocol for file transfer Enter the file name with the directory to be sent Execute the file transfer function Note The maximum wait time for the system is 50 seconds If a tim...

Page 41: ...ation Choose Save by using the Up Down arrow key The system will be restarted after the confirmation 6 5 System Reset and Software Download Select Main Menu Reset Software Download to download softwar...

Page 42: ...ol for file transfer Enter the file name with the directory to be sent Execute the file transfer function Note The maximum wait time for the system is 50 seconds If a timeout message appears repeat th...

Page 43: ...nfiguration screen to enter the IP address of the TFTP server and the file name you would like to download STEP 1 Select Main Menu Reset Software Download Remote Software Download TFTP to perform the...

Page 44: ...ect 2 Incorrect capitalization The password is case sensitive No LED display Check the power connection No Response from LAN port 1 Check network connection 2 Check SNMP configuration DSL Training fai...

Page 45: ...ment Local interface RS 232 DB9 for VT100 SNMP management 10BaseT Ethernet port Embedded SNMP agent Remote Management Through EOC Telnet Management Yes TFTP Software Download Yes Physical Dimensions W...

Page 46: ...n Definition 1 6 2 TD 7 3 RD 8 4 9 5 GND Table B 1 Console Port Pin Assignments RJ45 E1 interface Pin Definition Pin Definition 1 Rx Ring 2 Rx Tip 3 4 Tx Ring 5 Tx Tip 6 7 8 Table B 2 RJ45 E1 Interfac...

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