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Section 61223006L1-5C

Issue 3, December 2003

CLEI Code: T1L79B9A_ _

61223006L1-5C 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. Installation ................................................................................ 2

3. Connections .............................................................................. 6

4. HDSL2 System Testing ........................................................... 7

5. Control Port Operation.............................................................. 8

6. HDSL2 Deployment Guidelines ............................................. 23

7. Troubleshooting Procedures ................................................... 24

8. Maintenance............................................................................ 25

9. Product Specifications ............................................................ 25

10. Warranty and Customer Service ............................................. 25

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

TABLES

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

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

Table 3. DIP Switch Options ........................................................ 3

Table 4. Front Panel Indicators ..................................................... 4

Table 5. Provisioning Options ...................................................... 5

Table 6. HDSL2 Loss Values ..................................................... 23

Table 7. Troubleshooting Guide ................................................. 24

Table 8. T200 H2TU-C Specifications ....................................... 26

1. GENERAL

The ADTRAN T200 2-Wire HDSL2 Transceiver Unit

for the Central Office (T200 H2TU-C), P/N

1223006L1, is used to deploy an HDSL2 T1 circuit

using 2-wire metallic facilities. The unit occupies one

slot in a Type 200 or Type 400 enclosure. An illustration

of the T200 H2TU-C is shown in Figure 1.

Revision History

This third release of the documentation provides infor-

mation regarding new hardware and firmware features

and capabilities.

Description

HDSL2 provides extended range to DS1/T1 transport

while providing spectral compatibility with ADSL and

other transport technologies. DSX1 signals are provided

to and received from the network while HDSL2 signals

are provided to the local loop. The ADTRAN T200

H2TU-C works in conjunction with the ADTRAN

H2TU-R (remote unit) to provide a DS1 service up to

12,000 feet on the local loop.

Figure 1. ADTRAN T200 H2TU-C

Compatible versions of the ADTRAN H2TU-R are

listed in Table 1.

NOTE: x = any generic release number

Table 1. ADTRAN Unit Compatibility

Unit Number Description

122x026L1 T200 H2TU-R, Span Powered

122x024L1 T200 H2TU-R, Locally Powered

1223006L1

DSL

DSX/DS1

ALM

ESF/

AMI

B8ZS/

LBK

UCH T

T200 2-Wire HDSL2 Transceiver Unit for the Central Office

Installation and Maintenance Practice

Summary of content (30 pages)

PAGE 1
Section 61223006L1-5C Issue 3, December 2003 CLEI Code: T1L79B9A_ _ T200 2-Wire HDSL2 Transceiver Unit for the Central Office Installation and Maintenance Practice CONTENTS 1. General...................................................................................... 1 2. Installation ................................................................................ 2 3. Connections .............................................................................. 6 4. HDSL2 System Testing ....................
PAGE 2
Features This release of the T200 H2TU-C provides new and/or enhanced features as described below: Enhanced Performance Monitoring This unit features new firmware to retrieve and reset Performance Data parameters. TScan This unit is equipped to support the TScan™ feature, which provides data retrieval and diagnostic capabilities for remote management of DS1 circuits. TScan allows provisioning, performance, and event history information to be retrieved by the test center via the Facility Data Link (FDL).
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CAUTION Electronic modules can be damaged by ESD. When handling modules, wear an antistatic discharge wrist strap to prevent damage to electronic components. Place modules in antistatic packing material when transporting or storing. When working on modules, always place them on an approved antistatic mat that is electrically grounded. Instructions for Installing the Module To install the T200 2-Wire HDSL2 Transceiver Unit for the Central Office, perform the following steps: 1.
PAGE 4
Front Panel LED Indicators There are six front panel mounted status LED indicators. Each indicator is described in Table 4. Table 4.
PAGE 5
Provisioning The T200 H2TU-C DIP switch shown on Table 3 on page 3 controls several of the provisioning settings. Otherwise, configuration is performed via software discussed in the Control Port Operation section of this practice. The provisioning settings can be viewed and manipulated through access to the firmware via the front panel RS-232 port. Table 5 lists the available provisioning options and their factory default settings. Table 5.
PAGE 6
Span Powering The default span powering option is ENABLED. The T200 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 3). The span powering option can be set to DISABLED if the H2TUR is locally powered. 3. CONNECTIONS The T200 H2TU-C occupies one card slot in a T200 enclosure. Power and alarm signals are provided to the card through the backplane of the shelf.
PAGE 7
4. HDSL2 SYSTEM TESTING The ADTRAN HDSL2 system provides the ability to monitor the status and performance of the DSX-1 signals, DS1 signals, and HDSL2 loop signals. Detailed performance monitoring is provided by the front panelmounted 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 8
5. CONTROL PORT OPERATION The H2TU-C provides a DB-9 connector on the front panel that supplies an RS-232 interface for connection to a controlling terminal. The pinout of the DB-9 is illustrated in Figure 7. 1 6 7 8 9 2 TXD (Transmit Data) 3 RXD (Receive Data) 4 5 SGN (Signal Ground) Figure 7. RS-232 (DB-9) Pin Assignments The terminal interface operates at data rates from 1.2 kbps to 19.2 kbps. The asynchronous data format is fixed at 8 data bits, no parity, and 1 stop bit.
PAGE 9
The Unit Information Screen (Figure 9) provides detailed product information on each component in the HDSL2 circuit. ADRAN Technical Support contact numbers are also available from the Unit Information Screen. The Provisioning Screen (Figure 10) 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).
PAGE 10
The Span Status Screen (Figure 11) provides quick access to status information for each HDSL2 receiver in the circuit. The Status Screen Legend (Figure 12) provides a description of the messages that are used on the Status screens. Circuit ID: 12/01/03 09:44:39 Press ESC to return to previous menu Span Status Screen ATTEN ______ <-00dB-> ______ |H2TUC | |H2TUR | --LOS->| | | |------> | | | | NET | |<--------->| | CUST | |17dB 17dB| | <------| | MARGIN | |<-LOS-DSX-1 |______| |______| DS1 1. 2.
PAGE 11
The Detailed Status selection from the Span Status Screen menu (Figure 13) displays the T1 and HDSL2 status for each receiver point.
PAGE 12
The Loopback and Test Commands screen (Figure 14) 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.
PAGE 13
Additionally, some units store up to 48 hours worth of 60-minute interval data. At each 24-hour interval, the performance data is transferred into the previous 24hour performance data registers. This unit stores up to 31 days of 24-hour interval data. Select a module and interface to view the corresponding performance data. Line (L) and Path (P) can be viewed. Circuit ID: 12/01/03 09:59:45 Press ESC to return to previous menu Menu 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
PAGE 14
Abbreviations used in the Performance Data screens are defined in the Data Definitions screens (Figure 18 and Figure 19). Circuit ID: 12/01/03 10:04:08 Press ESC to return to previous menu Performance Data Definitions H2TUC, H2TUR, and H2R LOOP Related: ES-L Errored Seconds SES-L Severely Errored Seconds UAS-L Unavailable Seconds HDSL2 Framing CRC>=1 or LOSW>=1 CRC>=50 or LOSW>=1 >10 cont.
PAGE 15
The Scratch Pad, Circuit ID and Date/Time screen provides a logging medium for circuit information (Figure 20). The Scratch Pad is available for circuit-specific notes and can hold 50 alphanumeric characters in any combination. The circuit ID can be any alphanumeric string up to 25 characters in length. The time should be entered using military time. (For example, enter 3:15 p.m. as “151500”.) The date should be entered in the MMDDYY format. (For example, enter January 02, 2003, as “010203”.
PAGE 16
This unit includes two terminal emulation modes. The desired terminal mode can be selected from the Terminal Modes Screen, illustrated in Figure 21. Additionally, pressing CTRL+T while on any screen can toggle the two terminal modes. The Manual Update Mode allows the user to manually update the screens. This mode supports efficient print screen and log file utilities for storage of key provisioning parameters, alarm or performance history and current system status.
PAGE 17
The Alarm History screens are divided into three separate screens: T1 Alarm History (Figure 22), HDSL2 Span History (Figure 23), and HDSL2 History (Figure 24).
PAGE 18
The Facility Alarm History screen (Figure 24) displays: • • • • DC Open Over-current (short) Ground fault Power cycle Circuit ID: 12/01/03 10:46:50 Press ESC to return to previous menu Facility Alarm History LOCATION ALARM FIRST LAST CURRENT COUNT -------------------------------------------------------------------------------FACILITY DC OPEN OK 000 FACILITY SHORT OK 000 FACILITY GROUND FAULT OK 000 H2TU-C POWER CYCLE 01/01/00 00:00:02 01/01/00 00:00:02 OK 001 -----------------------------------
PAGE 19
The Event History screen (Figure 25) provides a log history of HDSL2 circuit events.
PAGE 20
The System PM/Screen Report option (Figure 26) offers four types of reports on performance monitoring. Selecting a report type will then display all the reports for that category on the screen at once, which is more efficient than stepping through the menus individually. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. The Clear PM and Alarm Histories screen (Figure 27) initializes data from performance monitoring and alarm histories.
PAGE 21
Item 12 on the Main Menu displays the Troubleshooting screen (Figure 28). Helpful ADTRAN contact information along with two menu items appear on the bottom of this screen. Selecting option 1 from the Troubleshooting screen causes the H2TU-C to read the operational status of the card and return Troubleshooting Guidance, or hints, as to the probable cause of the trouble, as shown in Figure 29.
PAGE 22
Selecting option 2 from the Troubleshooting screen accesses the General Information Screen (Figure 30) that summarizes the deployment guidelines necessary to provision this HDSL2 circuit. The Virtual Terminal Session Screen (Figure 31) allows control of the Remote card provisioning from the H2TU-C. Press 1 from this screen to begin a userinitiated session with the Remote card. When the remote session is completed, Press CTRL+X to terminate the session.
PAGE 23
6. 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 24
7. TROUBLESHOOTING PROCEDURES Table 7 is a troubleshooting guide for the T200 H2TU-C. Table 7. Troubleshooting Guide Condition All Front Panel indicators are Off. Solution 1. Verify that –48 VDC power is properly connected to the shelf. 2. Inspect the fuse to verify that it is not blown. 3. Insert the H2TU-C into a slot known to be in good working condition, and check the LEDs. 4. If Steps 1 and 2 pass, but Step 3 fails, replace the H2TU-C. DSL LED is Solid Red.
PAGE 25
8. MAINTENANCE The ADTRAN T200 H2TU-C requires no routine maintenance. In case of equipment malfunction, use the front panel bantam jack connectors to help locate the source of the problem. ADTRAN does not recommend that repairs be performed in the field. Repair services may be obtained by returning the defective unit to ADTRAN. Refer to the Warranty and Customer Service section of this Practice. Refer to the following subsections for sales, support, CAPS requests, or further information.
PAGE 26
Table 8. T200 H2TU-C Specifications Specification Description Loop Interface Modulation Type Mode Number of Pairs Bit Rate Baud Rate Service Range Loop Loss Bridged Taps Performance H2TU-C Tx Pwr (Data) Level H2TU-C Tx Pwr (Activation) Level Input Impedance Maximum Loop Resistance Return Loss 16-TC PAM Full Duplex, Partially Overlapped, Echo Canceling 1 1.552 Mbps 517.333 k baud Defined by Carrier Service Area Guidelines 35 dB maximum @ 196 kHz Single Taps < 2 kft, Total Taps < 2.5 kft Compliant with T1.
PAGE 27
Appendix A HDSL2 Loopbacks GENERAL 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 28
Table A-1. HDSL2 Loopback Control Codes Type Source 1 Code 2,3 Name Abbreviated (N) 3in7 (1110000) 4in7 (1111000) 5in7 (1111100) 6in7 (1111110) Loopback data from network toward network in the H2TU-R. FF1E (1111 1111 0001 1110) 3F1E (0011 1111 0001 1110) FF02 (1111 1111 0000 0010) 3F02 (0011 1111 0000 0010) 1in6 (100000) FF48 (ESF-DL) (1111 1111 0100 1000) 1in3 (100) FF24 (ESF-DL) (1111 1111 0010 0100) Loopback data from network toward network at H2TU-C.
PAGE 29
Table A-2. In-Band Addressable Loopback Codes (All codes listed below must be sent for a minimum of 5 seconds in order for them to be detected and acted upon.) Function Code Source Code and Response Arm 11000 (2-in-5 pattern) (N) If the pattern is sent from the network, the units will arm, and the H2TU-R will loop up if NIU Loopback is enabled. Disarm 11100 (3-in-5 pattern) (N/C) The H2TU-C is removed from the armed state.
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A-4 Issue 3, December 2003 61223006L1-5C