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Section 61181113L2-5A

Issue 1, November 2003

CLEI Code: T1L7HGLA _ _

61181113L2-5A 1

Trademarks: Any brand names and product names included in this document are

trademarks, registered trademarks, or trade names of their respective holders.

CONTENTS

1. General...................................................................................... 1

2. Description................................................................................ 1

3. Connections .............................................................................. 3

4. Installation ................................................................................ 4

5. HDSL2 System Testing ............................................................ 6

6. SCU Control Port Operation-HDSL2 ....................................... 7

7. Provisioning .............................................................................. 8

8. HDSL2 Deployment Guidelines ............................................. 30

9. Troubleshooting Procedures ................................................... 31

10. Maintenance............................................................................ 31

11. Product Specifications ............................................................ 31

12. Warranty and Customer Service ............................................. 31

Appendix A. HDSL2 Loopbacks ........................................... A-1

Appendix B. Front Panel DSX and MUX Mode Test Access B-1

TABLES

Table 1. ADTRAN HDSL2 Unit Compatibility....................... 1

Table 2. Compliance Codes ...................................................... 3

Table 3. Front Panel LEDs ....................................................... 5

Table 4. Provisioning Options .................................................. 8

Table 5. Auto In Service Status Indications ........................... 15

Table 6. HDSL2 Loss Values ................................................. 30

Table 7. Troubleshooting Guide ............................................. 31

Table 8. HDSL2 Total Access 3000 H2TU-C Specifications 32

Table A-1. HDSL2 Loopback Control Codes.......................... A-2

Table A-2. In-Band Addressable Loopback Codes ................. A-3

1. GENERAL

The ADTRAN Total Access

3000 2-Wire HDSL

(HDSL2) Transceiver Unit for the Central Office

(H2TU-C) (P/N 1181113L2) is used to deploy an

HDSL2 T1 circuit using 2-wire metallic facilities. The

unit occupies one slot in a Total Access 3000 or Total

Access 3010 Shelf. Figure 1 is an illustration of the

ADTRAN Total Access 3000 H2TU-C.

Revision History

This is the initial release of this document. Future

revisions to this document will be explained in this

subsection.

2. DESCRIPTION

The DSX-1 input signal can be supplied from the

network or a Total Access 3000 Multiplexer (DS3,

STS-1, or OC-3).

Figure 1. Total Access 3000 H2TU-C

DSX-1 signals are provided to and received from the

network, while HDSL2 signals are provided to the local

loop. The ADTRAN Total Access 3000 H2TU-C works

in conjunction with the ADTRAN H2TU-R to provide

a DS1 service up to 12,000 feet on the local loop.

Compatible ADTRAN units for this H2TU-C are shown

in Table 1.

x = any generic number

The H2TU-C can be deployed in circuits consisting of

one H2TU-C and one H2TU-R.

Table 1. ADTRAN HDSL2 Unit Compatibility

Part Number Description

122x024L2 T200 H2TU-R, Local Power

122x026L2 T200 H2TU-R, Span Power

1181113L2

H TUCH TUC

DSL

DSX

ALM

B8ZS/ALM

(YEL) (GRN)

ESF/ SF

(YEL) (GRN)

LBK

SCAN

Total Access 3000 H2TU-C,

HDSL2 Transceiver Unit for the Central Office

Installation and Maintenance Practice

Summary of content (40 pages)

PAGE 1
Section 61181113L2-5A Issue 1, November 2003 CLEI Code: T1L7HGLA _ _ Total Access 3000 H2TU-C, HDSL2 Transceiver Unit for the Central Office Installation and Maintenance Practice CONTENTS 1. General...................................................................................... 1 2. Description................................................................................ 1 3. Connections .............................................................................. 3 4. Installation ...............
PAGE 2
Features The basic features of the HDSL2 Total Access 3000 H2TU-C, (P/N 1181113L2) include the following: • • • • • Auto In Service Bit Error Rate Testing (BERT) Flash Upgrade Troubleshooting Guidance TScan These and other features will be discussed in the practice. The H2TU-C contains an onboard fuse. If the fuse opens, it supplies a –48 VDC voltage to the fuse alarm bus, and all front panel indicators turn off. The fuse is not designed to be replaced in the field.
PAGE 3
Table 2. Compliance Codes Code Input Power Code (PC) F C Telecommunication Code (TC) – X Installation Code (IC) A – 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 operation. WARNING Up to –200 VDC may be present on telecommunications wiring.
PAGE 4
Powering Modes The H2TU-C is capable of span powering the H2TU-R by applying current to the local loop. From 10 to 150 mA of current is coupled onto the HDSL2 span to power the H2TU-R when deployed. (See Figure 4.) If there is a need to remove an H2TU-C from the Total Access shelf, the H2TU-C should be provisioned for the Out-Of-Service-Maintenance or Out-Of-ServiceUnassigned state. This will disable all HDSL2 level alarms from being sent to the shelf.
PAGE 5
Instructions for Installing the Module To install the Total Access 3000 H2TU-C, perform the following steps: 1. If present, remove the Access Module Blank from the appropriate access module slot of the Total Access chassis. 2. Pull the ejector latch, located on the lower lefthand side of the Total Access 3000 H2TU-C front panel, from its closed position. 3. Hold the unit by the front panel while supporting the bottom edge of the module with the ejector latch opened to engage the chassis edge. 4.
PAGE 6
5. HDSL2 SYSTEM TESTING The ADTRAN HDSL2 system provides the ability to monitor the status and performance of the DSX1 signals, DS1 signals, and HDSL2 loop signals. Detailed performance monitoring is provided by the Total Access SCU via a front panel-mounted RS-232 Control Port. These features are valuable in troubleshooting and isolating any system level problems that may occur at installation or during operation of the HDSL2 system. The following subsections describe additional testing features.
PAGE 7
In addition to network side loopbacks, the H2TU-C provides customer side loopbacks initiated by using either the terminal control port or in-band loop codes. (See Appendix A.) In this mode, an AIS signal is transmitted to the network. 6. SCU CONTROL PORT OPERATION-HDSL2 The Total Access 3000 provides a front panel-mounted DB-9 connector that supplies an RS-232 interface for connection to a controlling terminal. The pinout of the DB-9 is illustrated in Figure 7.
PAGE 8
7. PROVISIONING Through management access via the Total Access 3000 System Controller Unit (SCU), as detailed in the SCU Control Port Operation-HDSL2 section, the provisioning settings can be viewed and manipulated. Table 4 lists the available provisioning options and the factory default settings. Table 4. Provisioning Options Provisioning Option Option Settings Default Settings 1. DSX-1 Line Build Out 0-133 ft. 133-266 ft. 266-399 ft. 399-533 ft. 533-655 ft. 0 to 133 ft. 2.
PAGE 9
The screens illustrated in Figure 8 through Figure 42 are for an HDSL2 circuit deployed with the ADTRAN HDSL2 technology. The circuit includes an H2TU-C and H2TU-R. Other configurations are possible (for example, an HDSL2 repeater from another vendor’s equipment), and their displays will vary slightly from those shown in this section. TID: Accessing the HDSL2 circuit information via the Total Access 3000 SCU control port requires the user to logon by entering a password. See Figure 8.
PAGE 10
The Access Module Menus screen (Figure 10) will display the access modules occupying the Total Access 3000 shelf. Select the corresponding channel slot number for the desired H2TU-C. To the right of each access module listed, the current alarm state is indicated. Shelf: 1 Unacknowledged Alarms: None First displayed is the ADTRAN HDSL2 Main Menu, from which the various OAM&P (Operation, Administrative, Maintenance, and Provisioning) screens may be accessed (Figure 11).
PAGE 11
The Unit Information Screen (Figure 12) provides detailed product information on each component in the HDSL2 circuit. ADTRAN Technical Support contact numbers are also available from the Unit Information Screen.
PAGE 12
The Provisioning Screen (Figure 13) displays current provisioning settings for the HDSL2 circuit. Options that can be changed from this screen are labeled with a number (for example, “1” for DSX-1 Line Build Out). To change a particular option setting, select the appropriate number and a new menu will appear with a list of the available settings. Note that there is more than one screen for the Provisioning Menu. Press the N (and ENTER) to move forward to the next screen.
PAGE 13
The Span Status Screen (Figure 15) provides quick access to status information for each HDSL2 receiver in the circuit. The Status Screen Legend (Figure 16) provides a description of the messages that are used on the Status screens.
PAGE 14
The Detailed Status selection from the Span Status Screen menu (Figure 17) displays the T1 and HDSL2 status for each receiver point.
PAGE 15
The Auto In Service Status Screen (Figure 18) provides the status of the Auto In Service feature. Options for this feature are as follows: The T1 alarm indications will display if the External Alarms option is enabled on the Provisioning Screen (Figure 13). This screen also indicates the startup or exit period remaining as either 1, 4, 8, or 24 hours.
PAGE 16
The Loopback and Test screen (Figure 19) provides the user with the ability to evoke or terminate all available HDSL2 loopbacks. Each HDSL2 circuit component can be looped toward the network or customer from this screen. Unit self tests can also be initiated from this screen. A Loop Down ALL Units command is available in lieu of the Self-Test option when any loopback is active. Option 7 from this screen accesses the BERT Test Functions capability of the Total Access 3000 H2TU-C.
PAGE 17
The BERT Test screen (Figure 20) is accessed by selecting the associated number on the Loopback and Test menu. A five-selection menu is at the bottom of the screen. Press the “1” key to start (or restart) a test, and “2” to manually stop the test. NOTE The BERT only runs unframed patterns. When the BERT is running, option 5 changes to “Inject Bit Errors”. Selecting number “3” from the BERT menu will allow the user to select the appropriate data test pattern for the desired results.
PAGE 18
Selecting number “4” from the BERT menu will display the first of the BERT Test Functions, the Time-out Screen (Figure 22). The time out can run for a specific duration by entering the hours and/or minutes, or can run indefinitely by entering 00:00, per the note on the screen. With no test running, selection “5” from the BERT menu will allow the tester to toggle the test signal in the opposite direction (from customer to network and vice versa).
PAGE 19
The Performance Monitoring screens (Figure 24 and Figure 25) allow the user to select and display the historical HDSL2 and T1 performance data in several different registers. At each 15-minute interval, the performance information is transferred to the 15-minute performance data register. This unit stores performance data in 15-minute increments for the last 24-hour period. At each 60-minute interval, the performance information is transferred to the 60-minute performance data register.
PAGE 20
Abbreviations used in the Performance Data screens are defined in the Data Definitions screens (Figure 26 and Figure 27).
PAGE 21
On The Scratch Pad and Circuit ID Screen (Figure 28), the circuit ID can be any alphanumeric string up to 25 characters in length. The Scratch Pad is available for circuit-specific notes and can hold 50 alphanumeric characters in any combination. The Alarm History screens are divided into three separate screens: T1 Alarm History (Figure 29), Facility Alarm History (Figure 30), and HDSL2 Span History (Figure 31).
PAGE 22
Facility Alarm History screen (Figure 30) displays: • • • • DC Open Over-current (short) Ground fault Power cycle HDSL2 Span History screen (Figure 31) displays: • Loss of Sync for each HDSL2 receiver • Margin Threshold Alarm for each HDSL2 receiver • Attenuation Threshold Alarm for each HDSL2 receiver Shelf: 1 Slot: 15 Total Access System 10/28/03 08:59 Unacknowledged Alarms: CRITICAL MAJOR INFO Circuit ID: Facility Alarm History LOCATION ALARM FIRST LAST CURRENT COUNT --------------------------------
PAGE 23
The Event History screen (Figure 32) provides a log history of HDSL2 circuit events.
PAGE 24
The System PM/Screen Report option from the Main Menu (Figure 33) offers these four types of reports on performance monitoring: 1. 2. 3. 4. Full System/History Report Current Status Report System Configuration Report Alarm/Event History Selecting a report type will display all the reports for that category on the screen at once, which is more efficient than stepping through menus individually to view each report.
PAGE 25
The Troubleshooting screen (Figure 35) compiles information received from all facilities and equipment in the circuit and presents them in both Real-Time and 7-Day historical format. The Troubleshooting Guidance screen (Figure 36) option (accessed from the Troubleshooting screen) analyzes this information and makes repair recommendations.
PAGE 26
The General Information screen (Figure 37) shows the Loop Deployment Guidelines for this type of circuit. Should trouble occur on the circuit, many test details are available here. Ability to download new firmware for the unit is available via the Total Access H2TU-C Flash Image screen (Figure 38). This feature allows the download and installation of a firmware upgrade. Any existing provisioning setting will be retained, while new provisioning items will assume the factory default settings.
PAGE 27
The Y-Modem Flash Upgrade screen (Figure 39) allows the user to initiate a Y-Modem file transfer from the computer connected to the SCU craft access port to the H2TU-C. This file is transferred to the SCU and downloaded to the H2TU-C at the SCU craft port baud rate; therefore, a higher-speed connection to the SCU is recommended (typically 115200 baud) to reduce file download times. At 115200 baud, a typical flash download to the H2TU-C will take less than 3 minutes.
PAGE 28
The TFTP Flash screen (Figure 41) is utilized to perform a TFTP file transfer from a remotely located computer/server to the H2TU-C. During TFTP transfers, the SCU continues to act as an intermediary to receive the file data from the remote computer and then send it to the H2TU-C unit. Before initiating a TFTP transfer from the menu screen, the user should first enter the TFTP remote filename that is listed on H2TU-C TFTP menu (option 1).
PAGE 29
The Boot Block Status and Overwrite Password screen (Figure 42) is typically not used. This screen provides a method by which the bootcode can be updated on the H2TU-C. The bootcode is seldom changed with new download code. The bootcode is the small piece of code that allows firmware upgrades on the H2TU-C unit. If it becomes corrupted, the H2TU-C will require factory service to restore it to a functional state.
PAGE 30
8. HDSL2 DEPLOYMENT GUIDELINES The ADTRAN HDSL2 system is designed to provide DS1 based services over loops designed to comply with carrier service area (CSA) guidelines. CSA deployment guidelines are given below: 1. All loops are nonloaded only. 2. For loops with 26-AWG cable, the maximum loop length including bridged tap lengths is 9 kft. 3. For loops with 24-AWG cable, the maximum loop length including bridged tap lengths is 12 kft. 4. Any single bridged tap is limited to 2 kft. 5.
PAGE 31
9. TROUBLESHOOTING PROCEDURES Table 7 is a troubleshooting guide for the Total Access H2TU-C. Table 7. Troubleshooting Guide Condition Solution All front panel indicators are off. 1.Verify that –48 VDC power is properly connected to the shelf. 2.Insert the H2TU-C into an operational slot and check the PWR LED indicators. 3.If Step 1 passes, but Step 2 fails, replace the H2TU-C. 10. MAINTENANCE The ADTRAN Total Access H2TU-C requires no routine maintenance.
PAGE 32
Table 8. HDSL2 Total Access 3000 H2TU-C Specifications Specification Description Loop Interface Modulation Type Mode Number of Pairs Line Rate Baud Rate Loop Loss Bridged Taps Performance H2TU-C Transmit Power (Data) Level H2TU-C Transmit Power (Activation) Level Input Impedance Maximum Loop Resistance Return Loss 16 TC PAM Full Duplex, partially overlapped echo canceling 21 1.552 Mbps 517.333 k baud Refer to the HDSL2 Deployment Guidelines section for additional measurements. Single Taps < 2000 ft.
PAGE 33
Appendix A HDSL2 Loopbacks HDSL2 MAINTENANCE MODES This appendix describes operation of the HDSL2 system with regard to detection of inband and ESF facility data link loopback codes. Upon deactivation of a loopback, the HDSL2 system will synchronize automatically. Loopback Process Description In general, the loopback process for the HDSL2 system elements is modeled on the corresponding DS1 system process.
PAGE 34
Table A-1. HDSL2 Loopback Control Codes Code2,3 Name Abbreviated (N) (N) (C) (C) 3in7 (1110000) 4in7 (1111000) 6in7 (1111110) 5in7 (1111100) Loopback data from network toward network in the HTU-R. Loopback data from network toward network in the HTU-C. Loopback data from customer toward customer in HTU-C. Loopback data from customer toward customer in HTU-R.
PAGE 35
Table A-2. In-Band Addressable Loopback Codes Function Code (Hex / Binary) Response ARM (in-band) - also known as 2-in-5 pattern 11000 (binary) The H2TU-R will loop back toward the network. No AIS or errors will be sent as a result of this loopback. The H2TU-C will arm. Disarm (in-band) - also known as 3-in-5 pattern 11100 (binary) The H2TU-C is removed from the armed state. If any of the units are in loopback when the 11100 pattern is received, they will loop down.
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PAGE 37
Appendix B Front Panel DSX and MUX Mode Test Access GENERAL Figure B-1 through Figure B-3 are DSX-1 fed modes of operation, and Figure B-4 through Figure B-7 are MUX fed modes of operation. From the Provisioning screen (Figure 13), select “8” to choose the Network Source as MUX fed or DSX fed. When performing intrusive MUX mode testing, the equipment jack on the front panel can be configured to access the signal going to the Network or the Customer.
PAGE 38
MUX MODE TEST ACCESS MUX MON, TX to Customer The RX of the BERT receives data from the TX MON EQ jack (Figure B-4). This data is a copy of the data that the H2TU-C will transmit to the Customer. The TX of the BERT is not used. This test is non-intrusive. MUX EQ, TX to Network, RX from the Network The TX of the BERT is connected to the EQ TX jack, and the RX of the BERT is connected to the RX EQ jack (Figure B-6).
PAGE 39
MUX EQ, TX to Customer, RX from Customer The TX of the BERT is connected to the EQ TX jack, and the RX of the BERT is connected to the RX EQ jack (Figure B-7). The TX of the BERT is then substituted for the data that the H2TU-C sends to the Customer. The RX of the BERT receives data directly from the Customer. The MON TX and RX jacks are 432 ohm impedance copies of the EQ jack TX and RX. This test is intrusive. NOTE Via the Test screen, ensure that the equipment jack is in “ To Customer ” mode.
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B-4 Issue 1, November 2003 61181113L2-5A