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Paradyne HOTWIRE 7925, User Manual

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Paradyne HOTWIRE 7925 User Manual Download Page 40

Testing

 7-3

7925-A2-GB20-30

PRELIMINARY DRAFT

June 1997

Remote Loopbacks

When remote loopback is enabled the red Loop Bk LED on the front panel of the
remote-end unit (CO or CP) lights up and remains lit until the loopback is
disabled. The loopback LED on the initiating unit does not light.

Figure 7-3 illustrates remote loopback from a CO unit in a connection between
two units of the same compatibility (either two G.703-compatible units or two
V.35-compatible units).

Terminal

97-15259-01

CO

CP

E1 HDSL

7900

7900

Diagnostic

Equipment

E1 HDSL

7900

7900

Diagnostic

Equipment

Loop Bk

LED lights

Figure 7-3.

Remote Loopback from CO End, Two Like Units 
(both G.703 or V.35)

Summary of Contents for HOTWIRE 7925

Page 1: ...CHANGE Please note that the area code for Paradyne Corporation in Largo Florida has changed from 813 to 727 For any Paradyne telephone number that appears in this manual with an 813 area code dial 72...

Page 2: ...HOTWIRE MODEL 7925 STANDALONE E1 HDSL TERMINATION UNIT USER S GUIDE Document No 7925 A2 GB20 30 June 1997 PRELIMINARY DRAFT...

Page 3: ...on reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or change...

Page 4: ...riate regulatory agencies and inspection authorities to ensure compliance 6 A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings If products installed in...

Page 5: ...quipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense The authority to operate this equipment is...

Page 6: ...ge Checklist for HotWire Model 7925 A1 2 1 Connecting to the Network 2 1 Connecting Power to the Unit 2 2 3 Using Terminal and Switchpack Modes Choosing an Interface Mode 3 1 Connecting to a System Te...

Page 7: ...rformance Statistics 6 3 Remote Unit Information 6 5 Front Panel LEDs 6 6 G 703 Compatible Unit 6 6 V 35 Compatible Unit 6 7 7 Testing Detecting a Problem 7 1 Understanding Loopback Tests 7 1 Local Lo...

Page 8: ...le Pin Assignments Terminal Connection Cable Pin Assignments B 1 HDSL Loop Connection Cable Pin Assignments B 2 E1 Network 120 Ohm Connection Cable Pin Assignments B 3 C Switchpacks and Jumpers G 703...

Page 9: ...of each version of the Model 7925 and typical configurations Chapter 2 Installing the Unit Describes how to install the unit and make connections Chapter 3 Using Terminal and Switchpack Modes Provides...

Page 10: ...efines acronyms and terms used in this document Index Lists key terms acronyms concepts and sections in alphabetical order Product Related Documents Document Number Document Title 7900 A2 GB20 HotWire...

Page 11: ...r G 703 interface Meeting the requirements of repeaterless E1 transmission on loops exceeding standard specifications Automatic detection and compensation for inverted pairs and swapped loops signific...

Page 12: ...el Number Features 7925 A1 201 2Mb s G 703 compatible Connection to 120 Vac power supply 7925 A1 202 2Mb s V 35 compatible Connection to 120 Vac power supply 7925 A1 301 2Mb s G 703 compatible Connect...

Page 13: ...n each pair one unit is configured as a central site or central office CO and the other is the remote CP Each HotWire Model 7925 standalone unit is configured at the factory to operate at the CP side...

Page 14: ...HotWire Model 7900 Nest containing HotWire Model 7925 nest cards The nest cards each terminate a single subscriber line in the CO Each line is then converted to a G 703 interface for connection to oth...

Page 15: ...r network access application Switch Management Station 7900 Nest Nest Cards Telco 2 or 4 wire facilities between Cell Sites and MTSO Customer Premises Central Site G 703 G 703 Unit G 703 G 703 Unit G...

Page 16: ...4 twisted pair network cable into the rear panel HDSL jack Connect the other end to your HDSL network interface NOTE Do not use a flat VF network cable as this may severely degrade the performance of...

Page 17: ...ic adapter To obtain information on the various power cord adapters available refer to Warranty Sales and Service Information on page A at the beginning of this User s Guide If your package includes a...

Page 18: ...he line build out you still need to move jumpers on the board hardware In Switchpack Mode All configuration parameters are taken from the current setting of the switchpacks and jumpers You must ensure...

Page 19: ...rocedure is used to change the operating mode of the unit to either Terminal Mode the default setting or Switchpack Mode Refer to Chapter 4 for G 703 compatible units or Chapter 5 for V 35 compatible...

Page 20: ...settings determine how the unit operates You can change a unit s configuration options by Selecting the Board Configuration branch of the Main Menu while in Terminal Mode Changing switch pack and jump...

Page 21: ...eters on the board This function is affected by the status of the switchpack DIP switch control setting When operating in Terminal Mode the system default you can make configuration changes through th...

Page 22: ...ecify either Dual Loops A and B or Single Loop A only Loops A and B Loops A and B are enabled Loop A Only Loop A is enabled 3 E1 Line Encode Possible Settings HDB3 AMI Default Setting HDB3 Specifies t...

Page 23: ...the Line Build Out configuration option using either Terminal or Switchpack Mode Procedure To open the unit and change the LBO 1 If you are using Terminal Mode Select option 4 Board Configuration fro...

Page 24: ...ack and jumper positions are defined in Switchpacks and Jumpers Appendix C 3 Place the switchpack or jumper in the correct position for each desired configuration option For example to change a unit s...

Page 25: ...o change the line build out parameter manually Refer to Changing the Line Build Out on page 4 4 for more information Line build out selects a transmit wave form compatible with the chosen termination...

Page 26: ...option settings determine how the unit operates You can change a unit s configuration options by Selecting the Board Configuration branch of the Main Menu while in Terminal Mode Changing switchpack a...

Page 27: ...the board This function is affected by the status of the switchpack DIP switch control setting When operating in Terminal Mode the system default you can make configuration changes through the termin...

Page 28: ...enabled enter 2 at the Config prompt The system then prompts you to specify either Dual Loops A and B or Single Loop A only Loops A and B Loops A and B are enabled Loop A Only Loop A is enabled 3 Pay...

Page 29: ...guration changes manually This menu option is described in Displaying Switchpack Definitions on page 5 5 Making Changes in Switchpack Mode When operating in Switchpack Mode you can change configuratio...

Page 30: ...witch pack 1 definition 1 CO CP OFF CP ON CO 2 Double Single Loop Mode OFF Double ON Single 3 Not Used 4 5 00 11 Internal Timing OFF 0 ON 1 01 External Timing 10 Loop Timing 6 8 Not Used Switch pack 2...

Page 31: ...and performance statistics for the unit and its network connection You can monitor operations by viewing Board Status option from the Main Menu Performance Monitor option from the Main Menu Board Stat...

Page 32: ...mand 1 DTR ACTIVE DSR ACTIVE LOOPBACK STATUS OFF HDSL STATUS LOOP A is UP LOOP B is UP S N RATIO Loop A 44 0 dB Loop B 43 5 dB Command Board Status for V 35 Compatible Unit E1 status displays one of t...

Page 33: ...rted at any time Performance statistics update every second Accumulated performance statistics may be cleared and restarted by selecting option 7 on the performance menu NOTE There is no verification...

Page 34: ...mpatible Unit stats 1 Current 1 minute HDSL Errors FAW LoopA 0 FAW LoopB 0 CRC LoopA 0 CRC LoopB 0 FEBE LoopA 0 FEBE LoopB 0 Previous 1 minute HDSL Errors FAW LoopA 0 FAW LoopB 0 CRC LoopA 0 CRC LoopB...

Page 35: ...nit you can display information about the CO unit by using the HTUC menu options Similarly from a terminal attached to a CO unit the HTUR menu allows you to display information about the CP unit To ac...

Page 36: ...L L o o p A L o o p B NETWORK SYSTEM HDSL TM 7900 7900 97 15255 LED Meaning Local The local E1 interface has a loss of signal Remote The remote E1 interface has a loss of signal Loop Bk A bilateral l...

Page 37: ...A L o o p B 7900 C T S R T S R X D T X D 97 15263 LED Meaning Loop Bk A bilateral loopback has been initiated for testing the equipment connected to this unit PWR Power is applied to the unit FAIL The...

Page 38: ...cian to isolate equipment on the HDSL circuit to determine where on the circuit trouble may be occurring Loopback takes the system off line Data received from E1 or V 35 application equipment is loope...

Page 39: ...atible units or two V 35 compatible units Terminal 97 15249 01 CO CP E1 HDSL 7900 7900 E1 HDSL 7900 7900 Diagnostic Equipment Diagnostic Equipment Loop Bk LED lights Figure 7 1 Local Loopback from CO...

Page 40: ...d The loopback LED on the initiating unit does not light Figure 7 3 illustrates remote loopback from a CO unit in a connection between two units of the same compatibility either two G 703 compatible u...

Page 41: ...If you have a V 35 compatible unit enter 5 at the Command prompt Command 6 5 Local Loopback is Enabled Command 6 5 Local Loopback is Disabled To start or stop a remote loopback test If you have a G 70...

Page 42: ...ave a G 703 compatible unit enter 5 at the Command prompt If you have a V 35 compatible unit enter 4 at the Command prompt Command 5 4 Reset will bring the loops down Are you sure y n Command If y is...

Page 43: ...onfiguration settings based on the types of units G 703 compatible or V 35 compatible on either end of the HDSL connection There are three combinations of the two types of units G 703 compatible units...

Page 44: ...remises G 703 Compatible Unit Central Site Card Type CP default CO Loops Enabled Dual Loops A B or Single Loop A Must be same as CP side E1 Line Encode HDB3 or AMI Must be same as CP side Framing Fram...

Page 45: ...e units as follows factory defaults are in bold Configuration Option V 35 Compatible Unit Customer Premises V 35 Compatible Unit Central Site Card Type CP CO Loops Enabled Dual Loops A B or Single Loo...

Page 46: ...iming Loop N A Framing N A If the payload rate is 2048 Kbps use Unframed If the payload rate is less than 2048 Kbps use Framed E1 Line Encode N A HDB3 or AMI Line Build Out1 N A 75 ohm or 120 ohm 1 Ju...

Page 47: ...Bold HDSL Card Type CP CO Loops Enabled Loops A and B Loop A E1 Line Encode HDB3 AMI Framing Framed Unframed Line Build Out 75 ohm 120 ohm V 35 Compatible Units Configuration Worksheet Board Configur...

Page 48: ...Assignments This section defines the pin assignments for the terminal cable from the front panel modular jack to your PC s COM port If your PC s COM port requires a 9 pin D shell connector the cable m...

Page 49: ...ments 97 15442 1 4 5 7 8 2 3 7 6 8 20 4 5 Modular Pin 25 Pin D Shell Pin HDSL Loop Connection Cable Pin Assignments The HDSL modular connector that plugs into the rear panel of the unit has the follow...

Page 50: ...ection Cable Pin Assignments The 120 ohm modular connector that plugs into the rear panel of G 703 compatible units has the following pin assignments Pin Signal 1 Tx Ring 2 Tx Tip 3 unused 4 Rx Ring 5...

Page 51: ...assist you in locating the switchpacks and jumpers on the board The jumpers and switchpack detailed in Figure C 1 are used to change configuration options All other jumpers listed below should always...

Page 52: ...ings Terminal Mode Switchpack Mode Jumpers C31 C33 Pins 1 2 2 3 Settings 75 ohm line build out 120 ohm line build out Default in bold P6 P7 Jumpers P6 P7 Pins 1 2 2 3 Settings 120 ohm line build out 7...

Page 53: ...t you in locating the switchpacks and jumpers on the board The jumpers and switchpacks detailed in Figure C 2 are used to change configuration options All other jumpers listed below should always be l...

Page 54: ...ition 1 2 3 4 5 6 7 8 Settings ON 64 kbps ON 128 kbps ON 192 kbps ON 256 kbps ON 384 kbps ON 512 kbps ON 768 kbps ON 1024 kbps All ON 64 kbps All OFF 2048 kbps Pins 1 2 2 3 Settings Terminal Mode Swit...

Page 55: ...maintain and end a connection It also provides the signal conversion required for communication between the DTE and the network Data Set Ready An EIA lead standard for V 24 circuit CT 107 an output si...

Page 56: ...tions of a data link in order to isolate an equipment or data line problem A diagnostic procedure that sends a test message back to its origination point Out Of Frame An error condition in which frame...

Page 57: ...worksheets G 703 compatible unit A 5 V 35 compatible unit A 5 D data rate for V 35 compatible units 5 3 F framing options 4 3 G G 703 to G 703 configuration A 2 G 703 to V 35 configuration A 4 glossar...

Page 58: ...esetting the unit 4 4 5 4 7 5 S switchpack mode G 703 compatible units 4 5 V 35 compatible units 5 4 switchpacks G 703 compatible unit C 1 V 35 compatible unit C 3 how to display 4 5 5 5 T terminal ca...

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