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Operation

3-11

3350-A2-GB20-10

June 1996

Saving Edit Changes

Save edit changes to the Active area when you want

those changes to take effect immediately. Save edit
changes to the Customer area when you want to overwrite
the existing Customer configuration options and store
these changes for future use.

NOTE

If you attempt to exit the Edit
function after making changes
without performing a Save, the E1
NTU prompts you with Save
Options? Choose Yes or No.

To save edit changes,

1. From the Choose Function screen (one level above

the Edit screen, two levels below the top-level
menu screen), select Save.

F1

Choose Funct:
Edit

Save

F2

F3

2. Choose whether you want to save to the Active,

Customer 1, or Customer 2 area. Use the scroll
keys, if necessary.

F1

Save Edit to:
Activ

Cust1

F2

F3

Configuring the E1 NTU for
SNMP Management

To configure the E1 NTU for management by an

SNMP management system you must,

•

Select and configure the port that provides the link
to the SNMP management system.

•

Set the Internet Protocol (IP) address and subnet
mask needed to access the device (see Appendix F,
IP Network Addressing Scenario).

•

Select the link layer protocol (PPP or SLIP) for the
port.

•

Specify the two community names that are allowed
to access the device’s Management Information
Base (MIB).

•

Configure the device to send traps to the SNMP
manager, if desired.

Selecting the Port

The SNMP manager or network device (e.g., a router)

can be directly connected to the communications (COM)
port. An external LAN Adapter can be connected to either
the COM port or the auxiliary (AUX) port to provide
Ethernet or Token Ring connectivity. Also, the E1 NTU
can be daisy chained together by connecting the COM
port of one device to the AUX port of the other, providing
SNMP connectivity.

The COM port can support either synchronous or

asynchronous PPP, or asynchronous SLIP at data rates of
up to 38,400 bps. The AUX port can support data rates up
to 38,400 bps.

The example shown below assumes that the COM port

is being used as the link to the SNMP manager.

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Summary of Contents for 3350

Page 1: ...ry of AT T Any reference to AT T Paradyne is amended to read Paradyne Corporation AREA CODE 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 727 instead ...

Page 2: ...June 1996 ACCULINK 3350 E1 Network Termination Unit Operator s Guide Document No 3350 A2 GB20 10 Paradyne Printed on recycled paper ...

Page 3: ...pied or distributed transmitted transcribed stored in a retrieval system ortranslatedintoanyhumanorcomputerlanguageinanyformorbyanymeans electronic mechanical magnetic manualorotherwise ordisclosedtothirdparties without the express written permission of AT T Paradyne Corporation 8545 126th Avenue North P O Box 2826 Largo Florida 34649 2826 AT T Paradyne Corporation makes no representation or warra...

Page 4: ...n to the High bit rate Digital Subscriber Line HDSL network 7 When installed in the final configuration the product must comply with the applicable Safety Standards and regulatory requirements of the country in which it is installed If necessary consult with the appropriate regulatory agencies and inspection authorities to ensure compliance 8 A rare phenomenon can create a voltage potential betwee...

Page 5: ...RT 15 OF THE FCC RULES THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT THIS EQUIPMENT GENERATES USES AND CAN RADIATE RADIO FREQUENCY ENERGY AND IF NOT INSTALLED AND USED IN ACCORDANCE WITH THE INSTRUCTION MANUAL MAY CAUSE HARMFUL INTERFERENCE TO RADIO COMMUNICATIONS OPERATION OF THIS EQUIPMENT IN A R...

Page 6: ...tomer Support C O Sack Menendez Custom Brokers Attn Repair Center Customer Support 8545 126th Avenue North Building G Attn Repair Center Largo Florida 34649 8545 126th Avenue North Building G USA Largo Florida 34649 USA Make sure the RMA number is in a visible location on the outside of the shipping carton Out of Warranty If your equipment is out of warranty and you do not have a maintenance suppo...

Page 7: ...le 2 1 SNMP Connection Examples 2 2 Important Instructions 2 4 Optional Power Sources 2 4 Cabling Examples 2 7 Power Up Self Test 2 8 3 Operation Overview 3 2 Using the Front Panel 3 2 Displaying Unit Identity 3 7 Displaying LED Conditions 3 9 Changing Configuration Options 3 9 Configuring the E1 NTU for SNMP Management 3 11 Configuring SNMP Traps 3 16 Acquiring Releasing the User Interface 3 18 R...

Page 8: ...aps 4 11 Troubleshooting 4 12 Test Jacks 4 14 Test Commands 4 15 Local Loopback Tests 4 15 Test Patterns 4 19 Lamp Test 4 21 Displaying E1 NTU Test Status 4 22 Appendices A Front Panel Menu A 1 B Technical Specifications B 1 C Configuration Options C 1 D Pin Assignments D 1 E SNMP MIB Objects E 1 F IP Network Addressing Scenario F 1 G Front Panel Emulation G 1 H Equipment List H 1 Glossary Index ...

Page 9: ... Protocol SNMP if you want your E1 NTU to be managed by an SNMP manager Related Document 7800 A2 GB20 ACCULINK 3100 Series Open Management Application for HP OpenView User s Guide Reference Documents CSA 22 2 No 950 M89 CSA 108 M1983 FCC Part 15 UL 1950 Management Information Base for Network Management of TCP IP Based Internets MIBII RFC 1213 March 1991 Definitions of Managed Objects for the DS1 ...

Page 10: ...he signal format of ITU Recommendation G 703 and the frame structure of ITU Recommendation G 704 The Model 3350 NTU is available in a compact standalone case that can be mounted on a desktop or on a shelf Features The E1 NTU optimizes network performance with a wide range of features such as the following Software configuration menu displayed via a liquid crystal display LCD to permit quick and ea...

Page 11: ...issue Get and Set commands to an object in the SNMP database maintained by the E1 NTU The E1 NTU can be managed by any industry standard SNMP manager AT T Paradyne provides an SNMP application that runs on a Hewlett Packard HP OpenView network management platform For more information refer to the ACCULINK 3100 Series Open Management Application for HP OpenView User s Guide The E1 NTU supports the ...

Page 12: ... keypad three Function and four directional keys Twelve light emitting diodes LEDs Six test jacks Rear Panel The E1 NTU rear panel contains the connectors and switches required for the operation of the E1 NTU Figures 1 2 The connectors and switches are described in Table 1 1 F1 F2 F3 OK FAIL TEST SIG1 OOF ALRM NETWORK SIG2 SIG ALRM PDV OOF BPV LCD Lp1 Lp2 In Out In Out HDSL LINE E1 LINE E1 MON G 7...

Page 13: ... connections COM PORT Provides access to a locally connected PC an ASCII terminal or printer or an SNMP management link HDSL NETWORK Provides access to the HDSL network G 703 120Ω Provides a 120 ohm balanced G 703 interface G 703 120Ω 75Ω switch Selects either a 120 ohm balanced G 703 interface the switch is IN or a 75 ohm unbalanced G 703 interface the switch is OUT G 703 75Ω TX RX Provides two B...

Page 14: ...udes application examples cabling and power up information Application Example The E1 NTU acts as an interface between a High bit rate Digital Subscriber Line HDSL network and the customer s equipment The E1 NTU is connected to the customer s equipment through the G 703 DTE port It is connected to the network through the HDSL Network interface The E1 NTU normally operates in conjunction with a Lin...

Page 15: ...ing the COM port or the AUX port to an external LAN Adapter for Ethernet SNMP connectivity Figure 2 4 Daisy chaining the COM port of one device to the AUX port of the other to provide SNMP connectivity Figure 2 5 Remotely managing the E1 NTU through the Facility Data Link FDL Figure 2 6 NETWORK SNMP SNMP PPP SLIP 495 14777 NTU HDSL AAC LTU PBX Paradyne Figure 2 2 Direct Connection to an SNMP Manag...

Page 16: ...pter to SNMP ETHERNET SNMP NMS SNMP PPP 495 14780 LAN ADAPTER SNMP PPP SNMP PPP NTU NTU NTU NETWORK HDSL AAC LTU AAC LTU AAC LTU HDSL HDSL PBX Paradyne Paradyne Paradyne Figure 2 5 LAN Adapter and Daisy Chaining for SNMP Support ETHERNET SNMP FDL SNMP PPP 495 14781 NETWORK LAN ADAPTER NTU NTU Paradyne AAC LTU HDSL HDSL AAC LTU PBX Paradyne Figure 2 6 Remote SNMP Management through FDL ...

Page 17: ... the ac power module Use the following procedures only if you want to use an optional dc power source Using the optional dc power cable the E1 NTU is capable of operating on either a 24 Vdc power source 48 Vdc single source battery or 48 Vdc redundant source batteries for power backup To select the power choose one of the following power supply types Installing the 24 Vdc Power Supply To install t...

Page 18: ... and red wires to the 48 Vdc return source 2 Connect the green wire to a suitable earth ground 3 Connect the orange and blue wires to the ā48 Vdc input source 4 Cut the white wire off at the outer insulation 5 Plug the power connector into the E1 NTU 1 2 3 4 5 6 BLACK RED GREEN WHITE ORANGE BLUE 48 VDC INPUT 495 14744 X 48 VDC RETURN EARTH GROUND NTU POWER PLUG TO CUSTOMER SUPPLIED BATTERY CABLE N...

Page 19: ...the 48 Vdc return source A 3 Connect the green wire to a suitable earth ground 4 Connect the orange wire to the 48 Vdc input source B 5 Connect the blue wire to the 48 Vdc input source A 6 Cut the white wire off at the outer insulation 7 Plug the power connector into the E1 NTU 1 2 3 4 5 6 BLACK RED GREEN WHITE ORANGE BLUE 48 VDC RETURN B 48 VDC RETURN A EARTH GROUND 48 VDC INPUT B 48 VDC INPUT A ...

Page 20: ...open or earth shield connection for the 75 ohm RX interface This switch must be set to open when using the 120 ohm interface POWER HDSL NETWORK 120Ω G 703 AUX PORT OUT 75Ω 120Ω IN EARTH 75Ω TX RX 75Ω COM PORT RX SHIELD OPEN PORT 1 POWER HDSL NETWORK 120Ω G 703 AUX PORT OUT 75Ω 120Ω IN EARTH 75Ω TX RX 75Ω COM PORT RX SHIELD OPEN PORT 1 495 14773 TO AC POWER MODULE TO DC POWER OPTIONAL 3100 F1 550 3...

Page 21: ...s then start to flash simultaneously in the pattern twice ON then Off Then the LCD begins to flash characters and numbers in the same pattern alternating with the flashing LEDs 3 If the self test is successful the Passed screen appears for one second the Fail LED turns Off and the OK LED lights F1 Self Test Passed F2 F3 495 14751 OK TEST SIG1 SIG2 OOF NETWORK ALRM SIG ALRM PDV OOF BPV FAIL G 703 I...

Page 22: ...1 NTU for SNMP Management 3 11 Selecting the Port 3 11 Setting the IP Address 3 12 Selecting the Link Layer Protocol 3 13 Specifying the Community Name s and Access Type s 3 14 Configuring SNMP Traps 3 16 Enabling SNMP Trap Messages 3 16 Selecting the Number of Trap Managers 3 16 Configuring a Destination for SNMP Traps 3 17 Acquiring Releasing the User Interface 3 18 Acquiring the Active User Int...

Page 23: ... Front Panel The E1 NTU front panel Figure 3 1 consists of an LCD a keypad test jacks and 12 LEDs NOTE You can display a graphical representation of the E1 NTU front panel on an attached PC see Appendix G Front Panel Emulation F1 F2 F3 OK FAIL TEST SIG1 OOF ALRM NETWORK SIG2 SIG ALRM PDV OOF BPV LCD Lp1 Lp2 In Out In Out HDSL LINE E1 LINE E1 MON G 703 495 14729 Paradyne KEYPAD TEST JACKS LEDs Figu...

Page 24: ...cond line displays options and responses When a response is required select from the options displayed directly above the Function keys F1 F2 F3 make your choice by pressing the corresponding Function key Keypad The 7 button keypad Figure 3 3 enables you to navigate through the menu tree and select choices presented on the second line of the LCD F1 F2 F3 Figure 3 3 Keypad Use the key to move up th...

Page 25: ...h the right and the left of the screen two arrows appear The arrows indicate that you must use the scroll keys to bring the additional options onto the screen F1 F2 F3 Test Jacks Six test jacks are located on the front panel Figure 3 4 These are described in the Test Jacks section in Chapter 4 Maintenance Lp1 Lp2 In Out In Out HDSL NET E1 LINE E1 MON 495 14753 Figure 3 4 Test Jacks LEDs There are ...

Page 26: ...eing received from the network ON A recoverable signal is being received from the network on loop 1 OFF The signal cannot be recovered from the network on loop 1 a Loss of Signal condition exists SIG2 Green Monitors the signal being received from the network ON A recoverable signal is being received from the network on loop 2 OFF The signal cannot be recovered from the network on loop 2 a Loss of ...

Page 27: ...sts on the received G 703 DTE signal ON An alarm condition LOS LOF EER RAI AIS RMA MFA exists on the received G 703 DTE signal Use the Device Health and Status command to determine the alarm type OFF No alarm condition exists on the G 703 DTE Interface signal PDV Yellow Monitors Pulse Density Violations PDV on the received G 703 DTE signal ON At least one PDV was detected and corrected on the rece...

Page 28: ...change To display the E1 NTU s identity ID 1 From the top level menu screen select Stat F1 E1 HDSL NTU Stat Test Cnfig F2 F3 2 From the Status screen press the key until the ID selection appears on the screen F1 Status HDSL DevHS STest F2 F3 3 Select ID F1 Status TStat LED ID F2 F3 4 The following screens appear in the order listed each time you press the key F1 Identity Ser xxxxxxx F2 F3 F1 Ident...

Page 29: ...ppears on the screen F1 Control Rel ClrReg F2 F3 4 Select CID F1 Control Reset CID DL F2 F3 5 Use the and keys to position the cursor under the desired character You must enter a character before the moves the cursor to the next space to the right F1 CustID xxxxxxxx Up Down Save F2 F3 6 Enter the desired ID Press F1 Up and F2 Down to scroll up and down through the valid characters numbers for the ...

Page 30: ...gent device that displays only valid options for the current configuration Therefore you are only presented with menu choices that are consistent with the current configuration and operational state of the E1 NTU invalid combinations of configuration options do not appear Be aware that although all options are shown in this guide what you see on your E1 NTU varies with your configuration The E1 NT...

Page 31: ...y using the appropriate Function key Use the scroll keys if necessary F1 Load from Activ Cust1 F2 F3 3 Select Edit F1 Choose Funct Edit Save F2 F3 4 From the Edit screen select the functional group you want to edit by pressing the appropriate Function key Use the scroll keys if necessary The NET selection is shown as an example only F1 Edit DTE NET Gen F2 F3 The configuration options for the selec...

Page 32: ...and configure the port that provides the link to the SNMP management system Set the Internet Protocol IP address and subnet mask needed to access the device see Appendix F IP Network Addressing Scenario Select the link layer protocol PPP or SLIP for the port Specify the two community names that are allowed to access the device s Management Information Base MIB Configure the device to send traps to...

Page 33: ...g PPP the IP address can be negotiated if the network device e g router or SNMP manager supports such negotiation The IP address is composed of four fields with three digits per field xxx xxx xxx xxx The IP address is set for the COM port or the AUX port with LAN Adapter or daisy chain depending on which one has been chosen as the SNMP communications link The example below assumes that an IP addre...

Page 34: ...3 Selecting the Link Layer Protocol Two link layer protocols Point to Point Protocol PPP and Serial Line Internet Protocol SLIP are supported for connection to an external SNMP manager or network device e g a router PPP can be used for synchronous or asynchronous operation SLIP can be used for asynchronous operation only The E1 NTU implementation of PPP supports the following Full negotiation of P...

Page 35: ... You have the capability of specifying up to two community names community name 1 and community name 2 to be used by external SNMP managers when trying to access objects in the E1 NTU s MIB Once you specify the community name s you must then specify the type of access to the MIB that SNMP managers in the community are permitted to have To specify the community name 1 and its access type 1 From the...

Page 36: ...der numbers 0 9 lowercase letters a z uppercase letters A Z space character ASCII symbols ascending order based on ASCII code and the End of Line symbol The erases all characters to the right of the cursor 10 When you are through changing the community name you must press F3 Save to save the value Otherwise the original value will be retained 11 Press F1 Next until the Access 1 configuration optio...

Page 37: ...e configuration option set to be copied into the Edit area by using the appropriate Function key Use the scroll keys if necessary 3 Select Edit 4 From the Edit screen press the key until the Alarm selection appears on the screen 5 Select Alarm F1 Edit User Alarm SNMP F2 F3 6 Press F1 Next until the SNMP Trap configuration option appears 7 Press F2 Enab to enable trap messages over the SNMP managem...

Page 38: ...n option set to be copied into the Edit area by using the appropriate Function key Use the scroll keys if necessary 3 Select Edit 4 From the Edit screen press the key until the SNMP selection appears on the screen 5 Select SNMP F1 Edit User Alarm SNMP F2 F3 6 From the SNMP Config screen select Trap F1 SNMP Config Gen Trap F2 F3 7 Press F1 Next until the Trapn IP Address configuration option appear...

Page 39: ...t screen was displayed at the previous active user interface F1 E1 HDSL NTU Stat Test Cnfig F2 F3 The inactive interface displays the following message when a Function key is pressed or a connection is made on the inactive user interface and control cannot be switched because the currently active interface is in use On the screen either Ft Panel front panel or COM Port is displayed in the user int...

Page 40: ...reen F1 E1 HDSL NTU Stat Test Cnfig F2 F3 2 Select Ctrl F1 E1 HDSL NTU Test Cnfig Ctrl F2 F3 3 From the Control screen press the key until the Reset selection appears on the screen F1 Control Rel ClrReg F2 F3 4 Select Reset F1 Control ClrReg Reset F2 F3 5 From the Device Reset screen press F1 to initiate a reset of the E1 NTU the power up sequence screen appears Press F2 instead to return to the C...

Page 41: ...ser Interface Access Security section of this document is not available for viewing online due to its security sensitive contents To order this manual please call 1 800 545 2354 extension 2222 International customers call your local AT T Paradyne Sales representative ...

Page 42: ... Starting a Repeater Loopback 4 17 Aborting Loopbacks 4 18 Test Patterns 4 19 Sending Test Patterns 4 19 Monitoring 32767 Test Patterns 4 19 Aborting Test Patterns 4 20 Lamp Test 4 21 Starting a Lamp Test 4 21 Aborting a Lamp Test 4 21 Displaying E1 NTU Test Status 4 22 Overview The E1 NTU can detect and report faults and perform diagnostic tests These features ensure that your E1 NTU is giving yo...

Page 43: ... or more of the unit s integrated circuit chips failed to pass internal device level testing HDSL fail The unit failed to successfully test an internal HDSL subassembly HDB3 LOS fail The unit failed to encode data properly or to detect Loss Of Signal Alarm fail The unit failed to transmit AIS or to detect an RAI alarm Memory fail The unit failed program checksum verification LCD fail The front pan...

Page 44: ... on Loop1 A Loss Of Signal condition 6 consecutive synchronization word mismatches has been detected on loop 1 of the network interface The condition is cleared when a signal match occurs LOS on Loop2 A Loss Of Signal condition has been detected on loop 2 of the network interface The condition is cleared when a signal match occurs LOS at DTE A Loss Of Signal condition 175 consecutive zeros has bee...

Page 45: ...E interface PORT SNMP Down The SNMP management link is in a down state for PORT where PORT is COM or AUX This condition occurs if the PORT is configured for SNMP and communication between the management system and the E1 NTU is not currently possible for this port For the AUX port this condition is detected only when a device reset or power up occurs Selftest failed A failure was detected during t...

Page 46: ...Lp1 SigQ xx The loop 1 signal quality value xx is 0 to 10 A value of 10 indicates the noise margin is 9 dB or more above the margin needed to produce a bit error rate of approximately 10 7 The values of 2 to 9 indicate noise margins of 1 to 8 dB above this margin A value of 1 indicates the noise margin is less than or equal to the margin needed to produce a bit error rate of approximately 10 7 A v...

Page 47: ...creen displays may vary depending on the configuration of the E1 NTU The procedure for displaying DTE registers is similar to this example To display network NET performance 1 From the top level menu screen select Stat F1 E1 HDSL NTU Stat Test Cnfig F2 F3 2 From the Status screen press the key until the Perf selection appears on the screen 3 From the Status screen select Perf F1 Status DevHS STest...

Page 48: ...you want to display press F3 Dsply to display the registers for the interval selected Use the scroll keys to view additional register information F1 E1 Intvl xx ES xxx F2 F3 You can reset the performance registers via the ClrReg command in the Control branch of the front panel menu To clear the performance registers 1 From the top level menu screen press the key until the Ctrl selection appears on...

Page 49: ...l AIS or Loss of Frame LOF The maximum is 900 seconds The total number of errored seconds for the previous 24 hours UAS The number of unavailable seconds for the current interval An unavailable second is any one second interval when service is unavailable Detection occurs with 10 consecutive unavailable seconds The maximum is 900 seconds The total number of unavailable seconds for the previous 24 ...

Page 50: ... during the interval The event is identified by a letter as follows R A Remote Alarm Indication has been received on the network interface or the G 703 DTE interface L Loss Of Signal has occurred on the network interface or the G 703 DTE interface E The Excessive Error Rate threshold has been exceeded F A Frame Synchronization Bit Error has been detected V A Bipolar Violation has been detected If ...

Page 51: ...gnal at the x Interface where x is either Network or DTE An Excessive Error Rate has been detected at the x Interface where x is either Network or DTE Alarm Cleared An Excessive Error Rate at the x Interface where x is either Network or DTE Remote Alarm Indication signal received at the x Interface where x is either Network or DTE Alarm Cleared Remote Alarm Indication signal at the x Interface whe...

Page 52: ...zed an enterprise specific event See Table 4 5 for enterprise specific traps These traps are set by the Entp Trap configuration option Link Traps identify the condition of the communications interface either linkDown one of the communications interfaces has failed or linkUp one of the communications interfaces has just come up These traps are set by the Link Trap configuration option The communica...

Page 53: ...e G 703 DTE cable is securely attached at both ends 2 Check the DTE status 3 Change the RX SHIELD switch to the OPEN position when using the 120 ohm interface Message OOF at Net appears 1 Incompatible framing format between the network and the E1 NTU 2 Network cabling problem 3 Facility problem 1 Check that the framing format for the network interface is correct 2 Check that the network cable is s...

Page 54: ...ched at both ends A failure message appears followed by an 8 digit code x x x x x x x x Internal E1 NTU problem Record the 8 digit code then contact your AT T Paradyne field service representative SNMP link is down 1 The SNMP manager configuration is mismatched with the device configuration 2 The SNMP manager s link layer protocol is not running 1 Check that the configurations are matched 2 Start ...

Page 55: ...a signal to be inserted by external test equipment The signal is inserted and received on the HDSL Loop 1 side of the E1 NTU HDSL NET Lp2 HDSL Network Loop 2 A break in test jack that allows a signal to be inserted by external test equipment The signal is inserted and received on the HDSL Loop 2 side of the E1 NTU E1 LINE In A break in test jack that allows an E1 signal to be inserted toward the E...

Page 56: ...LB Payload Loopback PLB DTE Loopback DLB Repeater Loopback RLB The Line Loopback command can be activated and deactivated in response to commands received over the network interface The Network Interface configuration option NET LLB controls whether the E1 NTU responds to the commands transmitted on the network interface to initiate LLBs see Appendix C Configuration Options Local loopback tests ca...

Page 57: ... for valid loopback test combinations Starting a Payload Loopback The Payload Loopback command PLB loops the received signal on the network interface back to the network The signal is looped back as close to the G 703 DTE port as possible after it has passed through the framing circuitry of the E1 NTU Therefore framing CRCs and BPVs are corrected NTU DTE G 703 PLB HDSL AIS PAYLOAD LOOPBACK PLB 495...

Page 58: ...From the Loopback screen press the key until the DLB selection appears on the screen F1 Loopback Abort LLB PLB F2 F3 4 Select DLB F1 Loopback LLB PLB DLB F2 F3 Test Started appears on Line 2 If a DTE loopback is already in progress the Already Active message appears If an invalid combination of loopbacks is in progress the error message Invld Test Combo appears see Table 4 9 for valid loopback tes...

Page 59: ...r more loopback tests 1 From the top level menu screen select Test 2 From the Test screen select Lpbk F1 Test Lpbk Ptrns Lamp F2 F3 3 From the Loopback screen select Abort F1 Loopback Abort LLB PLB F2 F3 4 From the Loopback Abort screen press the desired Function key to abort All or one specific loopback test Use the scroll keys if necessary F1 Loopback Abort All LLB PLB F2 F3 When abort is comple...

Page 60: ... 3 From the Patterns screen select Send F1 Patterns Abort Send Mon F2 F3 4 From the Patterns Send screen press F1 to send a 32767 pattern or F2 to send a 1 in 8 pattern F1 Patterns Send 32767 1in8 F2 F3 The Test Started screen appears F1 Send Name and Dest Test Started F2 F3 Monitoring 32767 Test Patterns The Monitor command provides the number of errors detected in the 32767 test pattern To monit...

Page 61: ...creen press the desired Function key to abort either All active test patterns active Send test patterns or the active Monitor Mon test pattern F1 Patterns Abort All Send Mon F2 F3 The E1 NTU terminates the selected test pattern and displays the message Command Complete NOTE Be careful when selecting a specific test pattern to abort If you mistakenly choose to abort a test pattern that is not curre...

Page 62: ...n all LEDs blink F1 F2 F3 F1 0123456789 ABCDEFGHIJKLMNO F2 F3 5 When you are satisfied that all LEDs are lighting and the LCD is functioning properly abort the Lamp test from the Lamp Test screen If there is no activity on the E1 NTU front panel for five minutes the Device Health and Status screen appears automatically However the Lamp test remains active until it is aborted Aborting a Lamp Test T...

Page 63: ...ng you what tests are active for the E1 NTU Table 4 10 Test Status Messages Message Description No Test Active No tests are currently active LLB Test Active The network interface is in Line loopback PLB Test Active The network interface is in Payload loopback DLB Test Active The G 703 DTE port is in DTE loopback RLB Test Active The G 703 DTE port is in Repeater loopback 1 8 Test Active A 1 in 8 te...

Page 64: ...vHs STest Perf TStat LED ID HDSL DTE Cur 24Tot Intvl E1 Lpn Cur 24Tot Intvl DTE E1 Abort Send Mon Cur 24Tot Intvl Cnfig Load Edit Area From Edit Save Choose Function Cust1 Activ Cust2 Activ Cust1 Cust2 Fact User Alarm Gen NET SNMP Gen Trap Rel ClrReg Reset CID DL PLB DLB RLB LLB Abort 32767 1in8 HDSL DTE A ...

Page 65: ...c power module for input requirements 20 Vdc to 32 Vdc 0 16A 38 Vdc to 60 Vdc 0 08A 38 Vdc to 60 Vdc 0 08A POWER CONSUMPTION AND DISSIPATION 6 9 watts 23 6 Btu per hour at 115 volts ac power 4 0 watts 13 6 Btu per hour at 24 and 48 Vdc dc power G 703 DTE INTERFACE Physical Interface Framing Format Coding Format BNC pair for 75 ohm coaxial cables unbalanced or DB15 socket for 120 ohm twisted pair b...

Page 66: ... 22 Class A compliant PHYSICAL DIMENSIONS Height Width Depth 2 13 inches 5 4 cm 7 63 inches 19 4 cm 12 13 inches 30 8 cm WEIGHT 2 4 pounds 1 1 kg ENVIRONMENT Operating Temperature Storage Temperature Relative Humidity Shock and Vibration 32 F to 122 F 0 C to 50 C 4 F to 158 F 20 C to 70 C 5 95 noncondensing Withstands normal shipping and handling ...

Page 67: ... C 1 Network Interface Configuration Options The Network Interface configuration options configure the HDSL Network interface on the E1 NTU Table C 2 General Configuration Options The General configuration options configure clocks on the E1 NTU Table C 3 User Interface Configuration Options The User Interface configuration options configure and control the E1 NTU user interfaces Table C 4 Alarm Co...

Page 68: ...Density Bipolar 3 coding format Extrn DLB Disab Next Enab Disab Prev DTE Loopback on External Contact Allows the initiation and termination of a DTE Loopback DLB by an external contact For more information see the G 703 DTE Interface section in Appendix D Pin Assignments Enab Allows the E1 NTU to begin a DLB when the external contact is closed if the current E1 NTU state allows a DLB to be perform...

Page 69: ...unning SNMP over FDL requires an end to end FDL connection and cannot be terminated within the network Disab Disables the FDL Management Link SNMP Enables the FDL Management Link for SNMP NOTE This configuration option is not available if EDL is enabled for SNMP NOTE If the local E1 NTU s FDL is enabled for SNMP the remote E1 NTU s FDL must also be enabled for SNMP HDSL Disab Next Disab Maint Prev...

Page 70: ...ource for the E1 NTU NET Configures the HDSL Network interface as the primary clock source DTE Configures the G 703 DTE interface as the primary clock source This selection is not available if the G 703 DTE interface is disabled If the G 703 DTE interface is disabled after making this selection the primary clock source is changed to NET Int Configures the internal clock as the primary clock source...

Page 71: ...n another 33xx Series device NOTE SNMP and ASCII selections can be made using the ifAdminStatus MIB object up SNMP testing ASCII NOTE The Daisy selection requires the use of a customer supplied 8 pin to 8 pin straight through cable Whenever the cable is connected or disconnected change the Daisy selection to another selection and then back to Daisy to ensure that the correct parameters have been n...

Page 72: ... 7 8 Prev Communication Port Character Length Configures the character length 7 or 8 bits for the communication port NOTE This configuration option must be set to 8 if the communication port is used for Front Panel Emulation or SNMP management NOTE This configuration option is not available if the communication port is configured for synchronous operation CParity None Next None Even Odd Prev Commu...

Page 73: ...ry port is not to be used SNMP Specifies that the auxiliary port is to be used as the management link to an external SNMP manager via an external LAN adapter Daisy Specifies that the auxiliary port is to be used as an SNMP management link that is daisy chained to the communication port of another 33xx Series device NOTE The Daisy or SNMP selection requires the use of a customer supplied 8 pin to 8...

Page 74: ...e communication port Disab Prevents alarm messages for any alarm conditions NOTE Alarm messages are only sent to the communication port if the Com Use configuration option is set to ASCII otherwise the alarm messages are discarded SNMP Trap Disab Next Enab Disab Prev SNMP Trap Enable Specifies whether SNMP trap messages are sent over the SNMP management link For more information refer to the SNMP ...

Page 75: ...act Clear Allows you to clear the system contact CommunityName1 public Next Edit Clear Prev Community Name 1 Specifies the first of two community names that are allowed to access this unit s Management Information Base MIB External SNMP managers must supply this name to access an object in the MIB Edit Allows you to edit or display the first community name The factory default sets this string to p...

Page 76: ...when community name 2 is used Write access is allowed for all objects specified as read write in the MIB RFCs Read access is allowed for all objects specified as either read only or read write IP Adr Next Edit Clear Prev IP Address for the E1 NTU Specifies the IP address needed to access the E1 NTU Since this IP Address is not bound to a particular port it can be used for remote access via the FDL...

Page 77: ...r Daisy Edit Allows you to edit and or display the subnet mask for the communication port Clear Allows you to clear the subnet mask for the communication port The subnet mask is set to 000 000 000 000 If the subnet mask is 000 000 000 000 the IP protocol creates a default subnet mask based on the class of the IP address Class A 255 000 000 000 Class B 255 255 000 000 or Class C 255 255 255 000 Com...

Page 78: ...00 If the subnet mask is 000 000 000 000 the IP protocol creates a default subnet mask based on the class of the IP address Class A 255 000 000 000 Class B 255 255 000 000 or Class C 255 255 255 000 Def Netwk None Next None Com Aux FDL Prev Default Network Destination Specifies the default network destination This configuration option specifies where the default network is connected For example if...

Page 79: ...e communication port This selection only appears if the Com Use configuration option is set to SNMP or Daisy Aux The Trap Manager n network destination is the auxiliary port This selection only appears if the Aux Use configuration option is set to SNMP or Daisy FDL The Trap Manager n network destination is the FDL management link This selection only appears if the FDL management link is enabled fo...

Page 80: ...to the currently configured trap manager s Down Sends trap messages for linkDown events to the currently configured trap manager s Both Sends trap messages for linkUp and linkDown events to the currently configured trap manager s NOTE This configuration option is not available if the SNMP Trap configuration option in the Alarm Configuration Options section is disabled Trap I F E1s Next NET DTE E1s...

Page 81: ...Extrn DLB Enab Disab Send Ones Enab Disab Net Options Value HDSL Mode NTU LTU NET Frame CRC4 noCRC Mgmt Link Disab SNMP HDSL Disab Maint Circuit Ident Edit Clear General Options Value Pri Clk Src NET DTE Int User Options Value Self Test Enab Disab Com Use SNMP ASCII Daisy Com Type Async Sync Com Clk Int Ext Com Rate 1 2 2 4 4 8 9 6 14 4 19 2 38 4 Char Length 7 8 CParity None Even Odd CStop Bits 1 ...

Page 82: ...yName2 Edit Clear Access 2 Read R W IP Adr Edit Clear NetMask Edit Clear Com IP Adr Edit Clear Com NetMask Edit Clear Com Link PPP SLIP Aux IP Adr Edit Clear Aux NetMask Edit Clear Def Netwk None Com Aux FDL SNMP Trap Options Value Num Trap Mgrs 1 2 3 4 5 6 Trapn IP Adr Edit Clear Trapn Dst None Com Aux FDL Gen Trap Disab Warm Auth Both Entp Trap Enab Disab Link Trap Disab Up Down Both Trap I F NE...

Page 83: ...terconnecting cables are available from AT T Paradyne For cable feature numbers refer to Appendix H Equipment List This appendix describes the connector pin assignments for the E1 NTU AT T Paradyne cables and customer supplied cables HDSL Network Interface The HDSL Network interface is an 8 position unkeyed modular connector Table D 1 Table D 1 HDSL Network Connector Signal Pin Number Loop 2 Ring ...

Page 84: ...n option in the DTE Interface Configuration Options section of Appendix C The G 703 DTE cable Figure D 1 is typically supplied by a DTE vendor It is made of shielded twisted pair wires 22 AWG The cable connector is a DB15 plug Be sure to connect the shield ground only at the E1 NTU end to prevent ground loops Table D 2 G 703 DTE Connector 120 Ohm Signal Pin Number Receiver Tip from DTE 1 Receiver ...

Page 85: ...OTE For daisy chaining an AUX port to a COM port a customer supplied 8 pin to 8 pin straight through cable is required and the appropriate configuration options Com Use and Aux Use must be set to Daisy Whenever the cable is connected or disconnected you should change the Daisy selection to ensure that the correct parameters have been negotiated for the link layer Table D 3 AUX Port Connector Signa...

Page 86: ... COM port to PC cable is shown in Figure D 2 and the COM port to terminal printer cable is shown in Figure D 3 NOTE For daisy chaining an AUX port to a COM port a customer supplied 8 pin to 8 pin straight through cable is required and the appropriate configuration options Com Use and Aux Use must be set to Daisy Whenever the cable is connected or disconnected you should change the Daisy selection ...

Page 87: ...Pin Assignments D 5 3350 A2 GB20 10 June 1996 Figure D 2 COM Port to PC Cable Figure D 3 COM Port to Terminal Printer Cable ...

Page 88: ...ower cable is a 14 5 foot 18 AWG stranded cable The connector is terminated at one end with a 6 position connector The other end of the cable is terminated with a bare wire that should be connected to a DC power source Figure D 4 shows the wire colors The power source can be either a single source of 24 Vdc or up to two sources of 48 Vdc A and B You cannot connect 24 Vdc and 48 Vdc to the same uni...

Page 89: ...between Menu Commands and SNMP Objects E 14 Overview This appendix describes the Management Information Base MIB objects that are supported by the E1 NTU and provides a correlation between front panel commands and MIB objects Table E 1 Management Information Base MIB II RFC 1213 The objects defined by MIB II are organized into 10 different groups The E1 NTU implements only those groups where the s...

Page 90: ...ive identification of the network management subsystem contained in the unit This object displays the following object identifier 3350 1 3 6 1 4 1 74 1 14 2 3 1 System Group sysServices Object system 7 This object provides a value which indicates the set of services that are potentially offered by the E1 NTU Only the following values are supported by the E1 NTU physical 1 Layer 1 functionality for...

Page 91: ...AT T Paradyne E1 HDSL NTU Hardware Version CCA number for the CSU board AUX AUX port AT T Paradyne E1 HDSL NTU Hardware Version CCA number for the CSU board Interface Group ifType Object ifEntry 3 This object identifies the type of the interface based on the physical link protocol s immediately below the network layer Only the following values are supported by the E1 NTU e1 19 Used for the network...

Page 92: ...is disabled The interface is testing 3 when a test is active on the interface COM Port When configured as an SNMP management link up and down are based on the current state of the link layer protocol Otherwise the interface is always up 1 The interface is never in the testing 3 state AUX Port When configured as an SNMP management link up and down are based on the current state of the link layer pr...

Page 93: ... supported by the device and serves as the index to the address table Since indexes for tables must be unique only one ifIndex may be displayed for each IP address supported by the device If you have configured the same IP address for multiple interfaces or for default IP addresses you will not see all interfaces that support a particular IP address upon display of the ipAddrTable IP Group ipAdEnt...

Page 94: ...y not take a Multicast Class D address value Any assignment implicit or otherwise of an instance of this object to a value x must be rejected if the bitwise logical AND of x with the value of the corresponding instance of the ipForwardMask object is not equal to x IP Group ipRouteIfIndex Object ipRouteEntry 1 When the routing table is displayed the ipRouteIfIndex object for some entries may have a...

Page 95: ...sion object is defined by the DS1 E1 MIB The rs232 transmission object is defined by the RS 232 like MIB SNMP Group MIB II The SNMP Group objects that apply to a management agent are fully supported by the E1 NTU The following objects apply only to an NMS and return a zero value if accessed snmpInTooBigs snmp 8 snmpInNoSuchNames snmp 9 snmpInBadValues snmp 10 snmpInReadOnlys snmp 11 snmpInGenErrs ...

Page 96: ...pattern test on the interface This is the only value supported by the G 703 DTE interface dsx1SendOtherTestPattern 8 Specifies that the network interface is sending a 1 in 8 or 32767 test pattern This value is read only An attempt to write this value returns a badValue response Near End Group dsx1CircuitIdentifier Object dsx1ConfigEntry 8 This object is only supported on the network interface Near...

Page 97: ... dsx1CurrentIndex The index that identifies the E1 interface dsx1CurrentESs Errored Seconds for the current interval dsx1Current SESs Severely Errored Seconds for the current interval dsx1CurrentUASs Unavailable Seconds for the current interval dsx1CurrentBESs Bursty Errored Seconds for the current interval Near End Group The DS1 Interval Table Objects dsx1IntervalEntry The following DS1 interval ...

Page 98: ...s object contains the number of ports in the RS 232 like general port table This number is 3 for the 3350 NTU General Port Table RS 232 like MIB The general port table contains general configuration objects for the RS 232 like interfaces General Port Table rs232PortIndex Object rs232PortEntry 1 This object contains a unique value for each port and is used as an index into the general port table rs...

Page 99: ...es in the table that are counters rs232AsyncPortEntry 6 8 are used to collect statistics and are not supported Asynchronous Port Table rs232AsyncPortBits rs232AsyncPortEntry 2 This object specifies the number of bits in a character Only the following values are supported by the E1 NTU 7 7 bit characters Supported on the COM port only 8 8 bit characters Asynchronous Port Table rs232AsyncPortStopBit...

Page 100: ...upported for the network interface only Generic Interface Test Table Generic Interface MIB The test table provides access to additional tests loopbacks and pattern tests that are not in the interfaces group of MIB II Generic Interface Test Table ifExtnsTestType Object ifExtnsTestEntry 4 This object is a control variable used to start and stop operator initiated tests on the interface It provides t...

Page 101: ...IER wellKnownCodes 1 AT T Paradyne Enterprise MIB The variable devConfigAreaCopy under the devConfigAreaCopy group in the common area of the AT T Paradyne Enterprise MIB will be supported This variable allows the entire contents of one configuration area to be copied into another configuration area Only the following values are supported by the E1 NTU noOp 1 An attempt to read this value returns a...

Page 102: ...1RcvAIS dsx1OtherFailure dsx1RcvFarEndLOMF dsx1XmtFarEndLOMF Stat DevHS LOS at DTE OOF at DTE RAI at DTE AIS at DTE EER at DTE RMA at DTE MFA at DTE Read the dsx1LineStatus object for DTE E1 dsx1LossOfSignal dsx1LossOfFrame dsx1RcvFarEnd dsx1RcvAIS dsx1OtherFailure dsx1RcvFarEndLOMF dsx1XmtFarEndLOMF Stat Perf NET Cur CurTimer ES UAS SES BES Read the value in the following objects for NET E1 dsx1T...

Page 103: ...t LLB Set dsx1LoopbackConfig for NET E1 to dsx1LineLoop Set dsx1LoopbackConfig for NET E1 to dsx1NoLoop Test Lpbk PLB Test Lpbk Abort PLB Set dsx1LoopbackConfig for NET E1 to dsx1PayloadLoop Set dsx1LoopbackConfig for NET E1 to dsx1NoLoop Test Lpbk DLB Test Lpbk Abort DLB Set dsx1LoopbackConfig for DTE E1 to dsx1LineLoop Set dsx1LoopbackConfig for DTE E1 to dsx1NoLoop Test Lpbk RLB Test Lpbk Abort...

Page 104: ...oding for DTE E1 to dsx1HDB3 or dsx1AMI Cnfig Activ Edit NET NET Frame Set Display dsx1LineType for NET E1 to dsx1E1 or dsxE1 CRC Cnfig Activ Edit NET Mgmt Link Set Display dsx1Fdl for NET E1 to dsx1other or dsx1FDL none Cnfig Activ Edit User Com Rate Cnfig Activ Edit User Aux Rate Set Display rs232PortInSpeed or rs232PortOutSpeed for COM or AUX port Cnfig Activ Edit User Char Length Set Display r...

Page 105: ...e on full E1 links not fractional E1s Check with the service provider to be sure that the FDL is end to end i e not terminated at an intermediate point within the network Interconnected 33xx Series devices automatically pass routing information between them however a static route to the subnet s must be set in the routing table of the NMS host This route uses the 33xx Series device connected to th...

Page 106: ... E 3 6 1 0 Paradyn e CO MS PH ER E 361 0 Paradyn e CO MS PH ER E 361 0 Paradyn e CO MS PH ER E 361 0 Paradyn e CO MS PH ER E 361 0 Paradyn e 135 18 1 3 135 18 1 4 135 18 1 5 135 18 1 7 135 18 1 6 135 18 1 1 135 18 1 1 135 18 40 1 AUX COM IP ADDRESS 135 18 40 2 SUBNET 135 18 40 0 SUBNET 135 18 1 0 SNMP NMS NETWORK Figure F 1 Daisy Chained Standalone Devices at the Central Site ...

Page 107: ...r higher MS DOS 3 3 or higher and at least 4 MB of RAM A VGA color monitor with VGA adapter or higher resolution is required A mouse is also required The following procedures must be performed in the Windows environment To install Front Panel Emulation software 1 Insert the diskette into the appropriate drive 2 Select File from Program Manager 3 Choose Run 4 Type the letter of the drive being used...

Page 108: ...oxes The Com Port field needs to contain the actual communications port name as recorded in the Windows information file INI The Speed field needs to contain one of the following communications speeds 1200 2400 4800 9600 14400 19200 or 38400 and should match the E1 NTU s COM port configuration 5 Choose either a Local for near end E1 NTU or Remote for far end E1 NTU destination 6 If you chose a Loc...

Page 109: ...0 107699050 Modular COM Port to PC Cable 8 pin modular to DB9S 3100 F1 550 406941542 COM Port to Terminal Printer Cable 8 pin modular to DB25P 3100 F1 540 406941534 DC Power Cable 3100 F1 520 406941492 Front Panel Emulation Software 3100 C1 010 406942110 Wall Mount Rack Mount Adapter 3100 F1 400 406941674 H ...

Page 110: ...on The use to which a device is put ASCII American Standard Code for Information Interchange A 7 bit code which establishes compatibility between data services ASCII terminal printer Devices that can be attached either locally or remotely to the E1 NTU to display or print alarm messages asynchronous data Data transmission that is synchronized by a transmission start bit at the beginning of a chara...

Page 111: ...ion branch of the E1 NTU menu tree coaxial cable A transmission cable consisting of a conducting outer tube which encloses and is insulated from an inner conducting core coding A technique used to accommodate the ones density requirements of E1 lines COMCODE A code used when ordering parts COM port The communications port on the E1 NTU community name An identification used by SNMP to grant an SNMP...

Page 112: ...hin flexible magnetic disk enclose in a protective jacket DLB DTE Loopback Loops the received signal on the G 703 DTE port back to the DTE without change DL branch Download branch of the E1 NTU menu tree download A process that transfers device firmware from a locally attached PC to a device or allows the duplication of firmware from a local device to a remote device downstream device A device tha...

Page 113: ...designed to get frames from one part of the network to another as quickly as possible framing A technique that separates bits into identifiable groups Generic Interface Extension MIB An extension to MIB II that defines additional objects for control of generic interfaces in MIB II Get command SNMP Read only access to SNMP MIB objects ground A physical connection to earth or other reference point G...

Page 114: ...nk trap A trap that identifies the condition of the communications interface linkDown or linkUp traps LLB Line Loopback Loops the received signal on the network interface back to the network without change local loop A twisted wire pair cable that connects the subscriber s premises to the local switching office LOF Loss Of Frame The inability to maintain frame synchronization LOFC Loss Of Frame Co...

Page 115: ...t have a value of one payload The information bits in a frame PBX Private Branch Exchange Telephone switching equipment dedicated to one customer A PBX connects private telephones to each other and to the public network PC Personal computer In this document references to a PC imply an IBM PC or an IBM compatible PC PDU Protocol Data Unit Used when adding routes in the Internet PDV Pulse Density Vi...

Page 116: ...aging RS 232 type interfaces and supports management communication ports on the E1 NTU self test A test that checks most hardware components when power is applied to the device or a reset is initiated server A device that offers a specific service such as database management to a client SES Severely Errored Seconds For E1 data seconds with 805 or more CRC errors or errored frame alignment signals ...

Page 117: ...rotocol describing how messages reach application programs within a destination computer UL Underwriter s Laboratories Inc An organization which promotes product safety Vac Volts alternating current Vdc Volts direct current WAN Wide Area Network A network that spans a large geographic area e g a country warmStart trap An SNMP trap that indicates that the device has reinitialized itself 1in8 Test A...

Page 118: ...n front panel LED indication 3 6 Performance Report message 4 9 troubleshooting 4 13 C cabling equipment list H 1 examples 2 7 pin assignments D 1 D 6 CID Customer Identification branch example of use 3 8 in the menu tree A 1 Circuit Identifier configuration option C 3 ClrReg Clear Performance Registers branch example of use 4 7 in the menu tree A 1 Cnfig Configuration branch See configuration opt...

Page 119: ...tal specifications B 2 equipment list H 1 error messages See messages alarm ES Errored Seconds report 4 8 F Facility Data Link FDL configuration option C 3 used with SNMP system 1 2 2 2 2 3 F 1 Fact Factory configuration area functional description 3 9 in the menu tree A 1 failure analysis See troubleshooting failure message during power up self test 2 8 4 4 troubleshooting 4 13 feature numbers H ...

Page 120: ...ED indication 3 5 3 6 Performance Report message 4 8 4 9 Self Test Health message 4 2 troubleshooting 4 12 Lpbk Local Loopback branch example of use 4 15 4 18 in the menu tree A 1 M maintenance device health and status 4 3 4 4 HDSL loop performance 4 5 performance reporting 4 6 4 9 power up self test 2 8 4 2 manager SNMP 1 2 menu tree A 1 messages alarm Device Health and Status 4 3 Performance Rep...

Page 121: ...18 3 19 in the menu tree A 1 repeater loopback RLB 4 17 4 18 reset front panel indications 2 8 procedure 3 19 Reset branch example of use 3 19 in the menu tree A 1 RMA Remote Multiframe Alarm condition ASCII terminal printer message 4 10 Device Health and Status message 4 4 RX network connector 1 4 RX shield 1 4 S self test displaying results 4 2 front panel indications 2 8 3 5 troubleshooting 4 1...

Page 122: ...rns 4 19 4 20 test jacks functional description 4 14 physical description 1 3 3 2 3 4 traps SNMP See SNMP traps troubleshooting device health 4 3 4 4 diagnostic table 4 12 4 13 HDSL loop performance 4 5 performance 4 6 4 9 power up self test 2 8 4 2 TStat Test Status branch example of use 4 22 in the menu tree A 1 TX network connector 1 4 U UAS Unavailable Seconds report 4 8 User Configuration bra...

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