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VeEX TX150 Manual

Sonet and pdh/dsn analyzer
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TX150 e-Manual D07-00-023 Rev A02
Page 1 of 107
TX150 SONET and PDH/DSn Analyzer e-
Manual
Please direct all questions to your local VeEX Sales Office, Representative or Distributor or contact VeEX technical support at
www.veexinc.com
© Copyright 2010 VeEX Incorporated. All rights reserved. No part of this user manual may be reproduced, translated into a
foreign language or be transmitted electronically without prior agreement and written consent of VeEX Incorporated as
governed by International copyright laws. Information contained in this manual is provided "as is" and is subject to change
without notice.
™Trademarks of VeEX Incorporated have been identified where applicable, however the absence of such identification does
not affect the legal status of any trademark.

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  • Page 1 Please direct all questions to your local VeEX Sales Office, Representative or Distributor or contact VeEX technical support at www.veexinc.com © Copyright 2010 VeEX Incorporated. All rights reserved. No part of this user manual may be reproduced, translated into a foreign language or be transmitted electronically without prior agreement and written consent of VeEX Incorporated as governed by International copyright laws.

  • Page 2: Table Of Contents

    TX150 e-Manual D07-00-023 Rev A02 Page 2 of 107 Table of Contents 1.0 Introduction 2.0 About this guide 3.0 Safety Information 4.0 Basic Operations 4.1 Keypad 4.2 Touch-Screen Display 4.3 Battery 5.0 Connectors and Panels 5.1 Test Ports 5.2 Bantam Interface 5.3 BNC Interface...
  • Page 3 TX150 e-Manual D07-00-023 Rev A02 Page 3 of 107 7.4 SONET Transmitter 7.4.1 Hierarchy 7.4.2 Interface 7.4.3 Structure 7.4.4 Payload 7.4.5 Pattern 7.5 SONET Receiver 7.5.1 Hierarchy 7.5.2 Interface 7.5.3 Structure 7.5.4 Payload 7.5.5 Pattern 7.6 Measurement Configuration 7.6.1 Timer 7.6.2 ITU-T Performance Analysis...
  • Page 4 TX150 e-Manual D07-00-023 Rev A02 Page 4 of 107 8.2.4 Signal 8.2.5 Histograms 8.2.6 Graph 8.2.7 Performance Analysis 9.0 Alarms / Errors 9.1 Alarm Generation 9.2 Error Insertion 10.0 SONET Functions 10.1 Overhead Analyzer 10.2 Overhead Generator 10.3 Pointer Testing 10.4 Path Trace Identifiers...

  • Page 5: Introduction

    No part of this document may be reproduced or transmitted electronically or otherwise without written permission from VeEX Inc. This device uses software either developed by VeEX Inc or licensed by VeEX Inc from third parties. The software is confidential and proprietary of VeEX Inc.

  • Page 6: Safety Information

    Optical Connectors The TX150 displays a laser warning icon when the laser source is active to alert the user about a potentially dangerous situation. It is recommended to; 1. Deactivate the laser before connecting or disconnecting optical cables or patchcords 2.

  • Page 7: Touch-Screen Display

    Print key. Performs a print of the current result or selected stored result. The print function requires a USB printer. For a list of supported printer please contact VeEX customer service. Store key. Performs the storage in the memory of the test set of the current results. If the result is running, it will provide a snap shot at the moment the key is pressed.

  • Page 8: Connectors And Panels

    Connectors - The unit provides three connectivity ports on the right: 10/100 T port, USB 2.0 Client port, and USB 2.0 Master port. To access the ports, remove the protective rubber cover on the right side. The serial number of the unit is provided on the back of the chassis. Please provide this number when contacting VeEX customer service.

  • Page 9: Sma Interface

    5.6 LEDs The TX150 is equipped with four fixed LEDs for test applications and one LED for Power status. The Power LED indicates the power state of the unit. The LED is off when the unit is powered off. The LED is green when the unit is powered on.

  • Page 10: Setup

    The upper part of the menu contains items specific to the test application of the handheld test set. The lower part of the menu contains items common to all VeEX VePAL100 handheld test sets including the LAN management port on the side of the unit.

  • Page 11: Signal Overview

    TX150 e-Manual D07-00-023 Rev A02 Page 11 of 107 SDH Mode SONET Mode SDH/SONET: To setup the SONET or SDH mode, first tab on the setup icon. In the Setup screen, tab the Measurements and tab the General. This application allows the user to set up the SONET or SDH interfaces and associated test parameters prior to running a test.

  • Page 12: Pdh/Dsn Transmitter

    TX150 e-Manual D07-00-023 Rev A02 Page 12 of 107 Changes to the Setup are applied immediately unless an invalid parameter has been selected. When the Tx and Rx signal structures need to be independent or asymmetrical, uncoupling the transmitter and receiver is possible.
  • Page 13 TX150 e-Manual D07-00-023 Rev A02 Page 13 of 107 Network Type : Select PDH/DSn as the network type. High Rate : Options are 1.5Mbit/s (DS1), 2Mbit/s (E1) and 34Mbit/s (E3), 45Mbit/s (DS3). Go back to top 7.2.2 Tx Setup > Interface Tapping the Interface box opens the Tx Interface Setup screen shown below.
  • Page 14 TX150 e-Manual D07-00-023 Rev A02 Page 14 of 107 - In E3 mode, the line code is HDB3 or AMI CLOCK SOURCE : Configurable as follows: - Internal clock: The clock for the transmitter is derived from the internal clock. The internal clock has an accuracy of +/- 3.5ppm conforming to G.812 recommendations.
  • Page 15 TX150 e-Manual D07-00-023 Rev A02 Page 15 of 107 In 2M mode, the options are 2M or Fractional E1 (N x64) where: - 2M: Configures the transmitter for full rate testing at 2,048Mbit/s - Fractional E1 (N x64) : Configures the transmitter for fractional testing using N or M 64kbit/s timeslots. (Contiguous or non- Contiguous timeslots).
  • Page 16 TX150 e-Manual D07-00-023 Rev A02 Page 16 of 107 PATTERN: Use the pattern drop down box to select the test pattern which will be inserted into the transmitted signal. Pseudo Random Bit Sequences (PRBS) defined by ITU-T 0.150 and 0.151 standards, fixed words and 24-bit user defined patterns are available.
  • Page 17 TX150 e-Manual D07-00-023 Rev A02 Page 17 of 107 Network Type : Select PDH/DSn as the network type. High Rate : Options are 1.5Mbit/s, 2Mbit/s, 34Mbit/s and 45Mbit/s. Dual : Dual DS1or E1 Receiver Option ON/OFF ; the Receiver 2 set exact same configuration as Receiver 1.
  • Page 18 TX150 e-Manual D07-00-023 Rev A02 Page 18 of 107 - Monitor: To be used when the measurement is made at a Protected Monitoring Point (PMP) of network equipment. The PMP level can range between -20 and -26dB. - Bridge: Available on in DS1 or E1 mode. Select this mode for a high impedance monitor test or when the receiver is connected directly in parallel to an DS1 or E1 line carrying live traffic.

  • Page 19: Pattern

    TX150 e-Manual D07-00-023 Rev A02 Page 19 of 107 Framing: Same options as Transmitter described previously Note: Unframed signal types are not supported in this mode, because framing is required to determine the location of timeslots. Timeslot Selection : Same options as Transmitter described previously Go back to top 7.3.4 Rx Setup >...
  • Page 20 TX150 e-Manual D07-00-023 Rev A02 Page 20 of 107 NETWORK TYPE : In the SONET mode, only optical interface options are available. TEST RATE: Options are OC-3, OC-12, OC-48 (referring to 155M, 622M and 2.5G respectively). MAPPING: STS mappings per Bellcore GR-253 and ANSI T1.105 recommendations are supported. The multiplexing...
  • Page 21 TX150 e-Manual D07-00-023 Rev A02 Page 21 of 107 Go back to top 7.4.1.1 Tx Setup > Hierarchy > Through Mode Tapping the Hierarchy box opens the Tx Hierarchy Setup screen. 1) Normal Mode: Unit working as normal SONET mode.
  • Page 22 TX150 e-Manual D07-00-023 Rev A02 Page 22 of 107 TEST PORT : Optical or Electrical. - Optical interface is available for OC-3, OC-12 and OC-48 signals. - Electrical interface is available for STS-3 signals. . CLOCK SOURCE: Same as DSn/PDH clock functions described previously.
  • Page 23 TX150 e-Manual D07-00-023 Rev A02 Page 23 of 107 Note: - VT-GRP: In order to carried a mixed size of VTs in a STS-1 SPE in an efficient manner, VT Group (VTG) is defined. The size of the VTG is 12 columns which is the least common multiple of the four sizes of VTs. Only one type of VT can be contained within each VTG.
  • Page 24 TX150 e-Manual D07-00-023 Rev A02 Page 24 of 107 - Fractional E1: Configures the transmitter for fractional testing using N or M 64kbit/s timeslots. (Contiguous or non-Contiguous timeslots). In STS-1 mapping mode/Tributary set to E3, the Low Rate option are 34M or 2M Mux (E3//E1 Mux) or Fractional E1 Mux (E3//E1 Mux w/Nx64) where;...
  • Page 25 TX150 e-Manual D07-00-023 Rev A02 Page 25 of 107 Go back to top 7.5.2 Rx Setup > Interface Tapping the interface setup box opens the Rx Interface screen. The interface setup options for the Rx are the same as for the Tx described previously except for clock offset which is not possible.
  • Page 26 TX150 e-Manual D07-00-023 Rev A02 Page 26 of 107 Go back to top 7.5.3 Rx Setup > Structure Tapping the structure setup box opens the Rx Structure screen. The structure setup options for the Rx are the same as for the Tx described previously.
  • Page 27 TX150 e-Manual D07-00-023 Rev A02 Page 27 of 107 Go back to top 7.5.5 Rx Setup > Pattern Tapping the Pattern box opens the Rx Pattern setup screen. The pattern setup options for the Rx are the same as for the Tx described previously except for the Out-of-Service selection which should be selected if the incoming signal is expected to contain a known test pattern.
  • Page 28 TX150 e-Manual D07-00-023 Rev A02 Page 28 of 107 7.6.1 Timer Setup - Configure a test to run for a fixed duration or a delayed start. MODE: Manual, Timed and Auto selections are available - Manual: This is linked to the Start/Stop function on the pull down menu - Timed: The test duration can be set by the user.
  • Page 29 TX150 e-Manual D07-00-023 Rev A02 Page 29 of 107 - G.821: Error performance of an international digital connection operating at a bit rate below the primary rate and forming part of an integrated service digital network (ISDN) o Long term error performance conducted Out of Service (OOS)
  • Page 30 TX150 e-Manual D07-00-023 Rev A02 Page 30 of 107 o BIS limits for OOS/ISM o Evaluation periods of 15 minutes, 2 hours and 24 hours o First step is a continuity test for 15 minutes o PDH paths are composed of sub-elements of different lengths each with its own set Reference Performance Objectives (RPO) - M.2101 Analysis: Performance limits and objectives for maintenance and bringing into service SONET paths and multiplex...
  • Page 31 The Auto-configuration function is described below. The “Auto-Config” function automatically sets the receiver of the TX150. A search for SONET and PDH/DSn signals at both the electrical or optical inputs is performed to determine the signal structure. For electrical signals, both Terminated and PMP...
  • Page 32 - Payload: Only test patterns defined in ITU-T or ANSI standards will be recognized. If no test pattern is detected, the unit assumes live traffic. DSn/PDH signals: Unframed or framed payloads at all hierarchies. For 1.5M signals containing 64 kbit/s timeslots, the TX150 will assume live traffic and will not search for a test pattern.
  • Page 33 TX150 e-Manual D07-00-023 Rev A02 Page 33 of 107 Go back to top 8.1.2 Results > Errors/Alarms Page 1 The Error/Alarm tab brings up several pages showing the errors and alarm status. Page 1 of 4 (Dual DS1 mode, Page 1 of 6) provides an overview of all the Errors and Alarms applicable to the signal or network under test.
  • Page 34 TX150 e-Manual D07-00-023 Rev A02 Page 34 of 107 Note: Tapping the individual soft led will automatically link you to the applicable result screen which provides detailed information. Go back to top Results > Errors/Alarms Page 2 Page 2 of 4 lists the Alarms in logical order that are associated with the signal under test. All alarms are evaluated and stored.
  • Page 35 TX150 e-Manual D07-00-023 Rev A02 Page 35 of 107 Results > Errors/Alarms Page 4 Page 4 of 4 lists the Bit Error performance (BERT) associated with the signal under test. Dual DS1 Mode Go back to top 8.1.3 Results > Event Log The Event log tab brings up the screen listing the Error and Alarm events recorded during a test.
  • Page 36 TX150 e-Manual D07-00-023 Rev A02 Page 36 of 107 Go back to top 8.1.4 Results > Signal The Signal tab brings up the Frequency and Level Result screen. Frequency: The received signal frequency and offset is measured and displayed. For DS1 signals, the measurement is performed on both balanced 100ohm and unbalanced 75ohm interfaces.
  • Page 37 TX150 e-Manual D07-00-023 Rev A02 Page 37 of 107 Level: Measures the Peak and Peak-Peak voltage values of the incoming signal. The levels for the various signal types according to ITU-T/GR.253 recommendations are presented. Go back to top 8.1.5 Results > Analysis ITU-T/ANSI recommendations are available to analyze results.
  • Page 38 TX150 e-Manual D07-00-023 Rev A02 Page 38 of 107 The screen below depicts E1 errors. Other mode The screen below depicts BER and bit errors.
  • Page 39 TX150 e-Manual D07-00-023 Rev A02 Page 39 of 107 Go back to top 8.1.7 Results > Graph The Graph tab brings up the screen displaying a log of the Errors recorded during the measurement interval. A dedicated page is available for each errors type. Scroll through the various pages to display the anomaly of interest.
  • Page 40 TX150 e-Manual D07-00-023 Rev A02 Page 40 of 107 Go back to top 8.2 SONET Results 8.2.1 Results > Summary The Summary tab displays a summary page of test results and parameters. At a glance, the user is able to see if there are any alarms, errors or signal failure pertaining to the SONET signal and its payload.
  • Page 41 TX150 e-Manual D07-00-023 Rev A02 Page 41 of 107 - Green: No error or alarm is present - Red: An error or alarm condition is detected and is currently present - Yellow: Indicates a history condition. An error or alarm was detected during the measurement interval but it is no longer...
  • Page 42 TX150 e-Manual D07-00-023 Rev A02 Page 42 of 107 SONET Error and Alarm defection criteria per Bellcore GR.253 and ANSI T1.105/231;...
  • Page 43 TX150 e-Manual D07-00-023 Rev A02 Page 43 of 107 PDH alarms are described previously Go back to top Results > Errors/Alarms (page 2) Page 2 lists the SONET Errors in logical order that are associated with the signal under test. All errors are evaluated and stored.
  • Page 44 TX150 e-Manual D07-00-023 Rev A02 Page 44 of 107 Go back to top Results > Errors/Alarms (page 3) Page 3 lists the Section and Line Overhead Alarms in logical order associated with the signal under test. All alarms are evaluated and stored. The Elapsed Time [ET] since the start of the test is shown in the upper right hand corner.
  • Page 45 TX150 e-Manual D07-00-023 Rev A02 Page 45 of 107 Go back to top Results > Errors/Alarms (page 5) Page 5 lists the VT Path in logical order that are associated with the signal under test. All alarms are evaluated and stored.
  • Page 46 TX150 e-Manual D07-00-023 Rev A02 Page 46 of 107 Go back to top Results > Errors/Alarms (page 7) Page 7 lists the PDH Errors in logical order that are associated with the signal and payload under test. All errors are evaluated and stored.

  • Page 47: Signal

    TX150 e-Manual D07-00-023 Rev A02 Page 47 of 107 Go back to top 8.2.4 Results > Signal (page 1&3) The signal tab displays the Level and Frequency screen. Page 1 displays the level measurement in electrical units (volts) for OC- 3, OC-12, OC-48 signals.
  • Page 48 To measure line frequency in service, the TX150 must be connected to a Protected Monitoring Point (PMP). The frequency of the signal is normally reported in Hz, while the deviation is reported in ppm. Tolerances for the various clock frequencies of SONET hierarchies are presented in the table below Level: Measures the Peak and Peak-Peak voltage values of the incoming signal.
  • Page 49 TX150 e-Manual D07-00-023 Rev A02 Page 49 of 107 Note: The alarms and errors presented depend on the signal type and structure selected. A graphical timeline on the horizontal axis indicates when the event occurred. The upper left and right arrows allow the user to scroll through the measurement period while the + and –...
  • Page 50 TX150 e-Manual D07-00-023 Rev A02 Page 50 of 107 Go back to top Results > Histogram (page 4) Page 4 displays the Alarms and Errors associated with the STS Path. The measured parameters are; - UNEQ-P (STS Path-Unequipped) - PLM-P (STS Path -Payload Mismatch)
  • Page 51 TX150 e-Manual D07-00-023 Rev A02 Page 51 of 107 Page 5 displays the Alarms and Errors associated with the Virtual Tributary (VT). - AIS-V (VT-Alarm Indication Signal) - LO-VP (VT-Loss of Pointer) Go back to top Results > Histogram (page 6) Page 6 displays the Alarms and Errors associated with the VT Path.
  • Page 52 TX150 e-Manual D07-00-023 Rev A02 Page 52 of 107 Go back to top Results > Histogram (page 7) Page 7 displays the Alarms associated with the payload. The measured parameters depend on the payload selected. Go back to top Results > Histogram (page 8)
  • Page 53 TX150 e-Manual D07-00-023 Rev A02 Page 53 of 107 Go back to top Results > Histogram (page 9) Page 9 displays the Errors associated with the test pattern. Go back to top 8.2.6 Results > Graph The Graph tab brings up the screen displaying a log of the Errors recorded during the measurement interval. A dedicated page is available for each of the following error types;...

  • Page 54: Performance Analysis

    TX150 e-Manual D07-00-023 Rev A02 Page 54 of 107 - B3 - REI -P - BIP -V - REI -V - PDH/DSn errors depending on payload Scroll through the various pages to display the anomaly of interest. A status pop-up screen can be accessed by tapping on the graph area.
  • Page 55 TX150 e-Manual D07-00-023 Rev A02 Page 55 of 107 Definitions: Errored Second (ES): A one-second time interval in which one or more bit errors occurs. Severely Errored Second (SES): A one-second interval in which the bit error ratio exceeds 10 Unavailable Second (UAS): A circuit is considered to be unavailable from the first of at least ten consecutive SES.
  • Page 56 TX150 e-Manual D07-00-023 Rev A02 Page 56 of 107 is available form the first of at least ten consecutive seconds which are not SES. Note: The recommended measurement time for G.821 and G.826 is 30 days. Go back to top Evaluation according to ITU-T G.828...
  • Page 57 TX150 e-Manual D07-00-023 Rev A02 Page 57 of 107 Go back to top Evaluation according tort ITU-T G.829 G.829 is based on the principle of monitoring block errors in-service. ES, SES, BBE and UAS are evaluated. G.829 evaluation can be performed on the following events:...
  • Page 58 TX150 e-Manual D07-00-023 Rev A02 Page 58 of 107 Go back to top Evaluation according to ITU-T M.2100 M.2100 applies to commissioning and maintenance. Commissioning consists of a 15-minute line up phase followed by a 24-hour in-service measurement. Once the line up phase is completed successfully, errors may occur within certain limits.
  • Page 59 TX150 e-Manual D07-00-023 Rev A02 Page 59 of 107 Go back to top Evaluation according to ITU-T M.2101 M.2101 is very similar to M.2100 except it deals with SONET systems only . ES, SES, BBE, SEP and UAS are evaluated.

  • Page 60: Alarms / Errors

    TX150 e-Manual D07-00-023 Rev A02 Page 60 of 107 Go back to top 9.0 Alarms / Errors The alarm and error generation functionality can be found on the main menu. Tap the Alarm/Error icon to display the alarm and error generation screen. The alarm and error functions are used in conjunction with the pull-down menu which has dedicated buttons for error injection and alarm generation.

  • Page 61: Error Insertion

    TX150 e-Manual D07-00-023 Rev A02 Page 61 of 107 - E1 signals: LOS, LOF, AIS, RDI - E3 signals: LOS, LOF, AIS, RDI Mode: Static (enable/disable) using pull down menu function. The following SONET alarms can be generated; SONET Types:...
  • Page 62 TX150 e-Manual D07-00-023 Rev A02 Page 62 of 107 The following PDH and T-Carrier errors can be generated; PDH/DSn error types: - DS1 signals: Code, FAS, Bit - DS3 signals: Code, FAS, Bit - E1 signals: Code, FAS, CRC, REI, E-bit, Bit - E3 signals: Code, FAS, Bit The following SONET errors can be generated;...

  • Page 63: Sonet Functions

    TX150 e-Manual D07-00-023 Rev A02 Page 63 of 107 Alarm Generation / Error Insertion (Pull down menu) At any time during the test process, you can inject errors or generate alarms by tapping the error injection and alarm generation buttons in the pull down menu.

  • Page 64: Overhead Analyzer

    TX150 e-Manual D07-00-023 Rev A02 Page 64 of 107 Overhead Analyzer: Displays the Section/Line Overhead (TOH) and STS Path Overhead (POH) bytes of the received channel. Overhead Generator: Used to edit Section/Line Overhead (TOH) and STS Path Overhead (POH) bytes of the received channel.
  • Page 65 TX150 e-Manual D07-00-023 Rev A02 Page 65 of 107 Tapping the applicable byte enables an automatic decode – a byte description including the Hexadecimal and Binary value is provided. For some bytes, an advanced decode of the various bits is also available.
  • Page 66 TX150 e-Manual D07-00-023 Rev A02 Page 66 of 107 - Regenerator section trace - Used to transmit a 16 or 64 byte identifier (trace) (including a CRC-7 byte) repeatedly so that all regenerators can verify their connection - Used for continuity testing between regenerators B1 Byte (Section-BIP) - A 8 bit even parity code used to check for transmission errors over the regenerator section.
  • Page 67 TX150 e-Manual D07-00-023 Rev A02 Page 67 of 107 D1/D2/D3 Bytes - Data Communications Channel (DCC) - D1, D2 and D3 together form a 192kbps message channel for OAM purposes - It can generate internal or external messages - It can also be used as a BER function...
  • Page 68 TX150 e-Manual D07-00-023 Rev A02 Page 68 of 107 - A 24 bit interleaved even parity code used to determine if transmission errors have occurred over the Section Layer - Its calculated over all the bits of the STS-3 frame except those in the Section overhead.
  • Page 69 TX150 e-Manual D07-00-023 Rev A02 Page 69 of 107 § 1111 Extra traffic channel K1 Byte (APS-Ring) - Used to activate and deactivate the switching between the main and protection paths on a multiplexer section - APS message type conforms to ITU-T G.841/ Bellcore GR.253 Ring Network architectures o Bits 1-4 are the condition §...
  • Page 70 TX150 e-Manual D07-00-023 Rev A02 Page 70 of 107 § 0001 to 1110 Channels 1 thru 14 § 1111 Extra traffic channel K2 Byte (APS-Linear) - Conforms to ITU-T G.783 / Bellcore GR.253 - Used to activate and deactivate the switching between the main and protection paths on a multiplexer section...
  • Page 71 TX150 e-Manual D07-00-023 Rev A02 Page 71 of 107 D4-D12 Bytes - Data Communications Channel (DCC) – together these nine bytes form a 576 kbps message channel for OAM purposes. - They can be used for internally or externally generated messages or BER function.
  • Page 72 TX150 e-Manual D07-00-023 Rev A02 Page 72 of 107 § 1010 Stratum 3 § 1100 SONET Minimum Clock § 1101 Stratum 3e § 1110 Previdsionable by the Network Operator § 1111 Not used for synchronization § Other bytes are reserved E2 Byte - A 64 kbps voice communication channel between multiplexers.
  • Page 73 TX150 e-Manual D07-00-023 Rev A02 Page 73 of 107 Path Overhead Layer The following is a partial list of POH bytes and their corresponding functions; J1 byte (STS path trace) - High Order STS-N path trace byte - An unique message is assigned to each path in a SONET network – therefore the path trace can be used to...
  • Page 74 TX150 e-Manual D07-00-023 Rev A02 Page 74 of 107 C2 byte (STS path signal label) - Indicate the type of payload being transported in the STS SPE, including the status of the mapped payloads. - The table below indicates the standard C2 binary values ;...
  • Page 75 TX150 e-Manual D07-00-023 Rev A02 Page 75 of 107 Mapping for ATM Mapping for DQDB Asynchronous mapping for FDDI Mapping for HDLC over SONET STS-1 payload with 1 VT-x payload defect STS-1 payload with 2 VT-x payload defects STS-1 payload with 3 VT-x payload defects...
  • Page 76 TX150 e-Manual D07-00-023 Rev A02 Page 76 of 107 - STS-3# path user channel used for communication between path elements H4 byte (VT Indicator) - Position or Sequence Indicator - Multiframe phase indicator used for tributary structured payloads Z3/Z4 byte (STS Path)
  • Page 77 TX150 e-Manual D07-00-023 Rev A02 Page 77 of 107 Z5 byte (STS Path TCM) - Allocated to provide a STS Path Tandem Connection monitoring function for contiguously concatenated STS-3 levels. o Bits 1-4: Used as an Incoming Error Count (IEC)
  • Page 78 TX150 e-Manual D07-00-023 Rev A02 Page 78 of 107 V5 byte (VT path overhead) - The first byte of a VT SPE, provides the functions of error checking, signal label and path status. - Continuous monitoring of anomalies or defects and payload composition at the path end or along the path...
  • Page 79 TX150 e-Manual D07-00-023 Rev A02 Page 79 of 107 J2 byte (VT path trace) - Used to transmit a configurable 16 byte identifier that enables the receiving path to continuously verify its connection with the transmitter - Uses the same byte structure as the J0 and J1 bytes Z6 byte (VT-TCM) - Provides VT tandem connection monitoring function (TCM-V) for the VT-1.5, VT-2 levels.
  • Page 80 TX150 e-Manual D07-00-023 Rev A02 Page 80 of 107 Z7 byte (VT path Extended Label) - If bits 5-7 of V5 byte are set to 101 (value = 5), then; o The signal label in Z7 byte becomes valid where;...
  • Page 81 TX150 e-Manual D07-00-023 Rev A02 Page 81 of 107 Go back to top 10.2 SONET Functions > Overhead Generator Tap the Overhead Generator icon to display the OH screens shown below. There are three tabs; - TOH TX which allows editing of select bytes associated with the Section Overhead. Editing of J0, K1, K2, S1 is permitted as follows;...
  • Page 82 TX150 e-Manual D07-00-023 Rev A02 Page 82 of 107 - POH TX which allows editing of select bytes associated with the Path Overhead. Editing of J1, C2, H4, G1, Z5, and J2, V5, Z6 is permitted as follows; o Hexadecimal value using pop up keypad o Binary values using simple on-screen bit toggle or pop-up keypad o Convenient pull down selections.
  • Page 83 TX150 e-Manual D07-00-023 Rev A02 Page 83 of 107 There are three tabs; Analysis Pointers keep SONET signals synchronous by compensating for timing differences without having to use stuffing bits. Pointers are allowed to move up or down every three frames however the actual rate should be slower. The Administrative Unit (AU) and the Tributary Unit (TU) each has its own pointer and the unit has two tabs for displaying the values and measurements.
  • Page 84 TX150 e-Manual D07-00-023 Rev A02 Page 84 of 107 Pointer Generator The Pointer generator is able to generate individual pointer movements as follows; o For STS pointers: - SS bits: Program bits 5 and 6 of the H1 byte to be either SONET [10], SONET [00], Unknown [01] or [11] - Pointer value: Transmits a new pointer address or value with or without a new data flag (NDF).
  • Page 85 TX150 e-Manual D07-00-023 Rev A02 Page 85 of 107 Standard ITU-T G.783 and ANSI T1.105.03 and Bellcore GR-253 sequences; - Sequence: Decide how to affect the pointer sequence. - Basic: Specify whether the pointer is increasing or decreasing. • Select Inc to increase the pointer value.
  • Page 86 TX150 e-Manual D07-00-023 Rev A02 Page 86 of 107 Note: 1. It is recommended to run one sequence with positive adjustments followed by another sequence with negative adjustments. Performing the measurement at the maximum positive and negative frequency offset applicable to the line rate increases the stress on the pointer processor.
  • Page 87 TX150 e-Manual D07-00-023 Rev A02 Page 87 of 107 - J1 [STS Path]: High order path section trace o Program a 16 or 64-byte identifier to check the high order transmission path o The message is transmitted one byte per STS-3 frame...
  • Page 88 TX150 e-Manual D07-00-023 Rev A02 Page 88 of 107 Go back to top 10.5 SONET Functions > Payload Labels This function is used to set the C2 and V5 Path Signal Labels which indicate the content of the High order and Low order VCs.
  • Page 89 TX150 e-Manual D07-00-023 Rev A02 Page 89 of 107 - V5 [VT Path]: Path signal label o Program the Tx and Rx label by editing the hexadecimal value or by using the convenient pull down menu selection o For the Rx label, you can enable or disable the Payload Mismatch (PLM) Alarm Go back to top 10.6 SONET Functions >...
  • Page 90 1 x 10 Test Procedure: 1. The TX150 should be connected to a tributary port of network element or transmission system to ensure that the switching time is measured for the service transported by the SONET network. 2. Ensure that no errors or alarms are present on the transmission system because this will impact the measurement.
  • Page 91 TX150 e-Manual D07-00-023 Rev A02 Page 91 of 107 Tap the APS Testing icon to display the APS testing screens shown below. The test procedure is as follows; - Sensor: Select the trigger that will initiate the APS measurement. The selections are AIS-V, AIS-L, AIS-P and TSE (bit errors) - Switch Time Limit: Configurable in the range from 50ms to 200ms, typically 50ms according to ITU-T recommendations.
  • Page 92 TX150 e-Manual D07-00-023 Rev A02 Page 92 of 107 Go back to top 10.7 SONET Functions > Tandem Connection Monitoring (TCM) The Tandem paths defined in ITU recommendation G .707 Annex D and Annex E. ITU-T recommendation G.707 defines a tandem connection source and sink and describes the responses of each when defect (alarm) and error conditions are detected.
  • Page 93 The TX150 automatically performs a sequential BER test on each SONET tributary (VT channel) - mapping can be either via STS-N. The unit checks for any alarms in the received signal, the SONET structure and for synchronization of the selected test...

  • Page 94: Pdh Functions

    TX150 e-Manual D07-00-023 Rev A02 Page 94 of 107 - K.L.M.: ITU-T Tributary numbering scheme - Report: Pass (OK) - J2 trace: Corresponds to the VT trace being transmitted - Label: Corresponds to the V5 byte signal label being transmitted Go back to top 10.9 SONET/SONET Functions >Round Trip Delay...
  • Page 95 – this of course will not provide information on distortions caused by misalignment and other impairments of the line. The TX150 on the other hand allows you to connect to a live system at the TX output port via a Protected Monitoring Point (PMP) or at the far end of a transmission line.
  • Page 96 Test Procedure: 1. The TX150 should be connected to transmission system to ensure that the switching time is measured for the service transported by the E1 links.

  • Page 97: E1 Frame Words

    TX150 e-Manual D07-00-023 Rev A02 Page 97 of 107 Go back to top 11.4 PDH Functions > E1 Frame Words This function requires the E1 signal to be framed. The NFAS word is used to carry information about the status of the link and to provide control signals for primary rate multiplexers.

  • Page 98: E1 Rx Data

    TX150 e-Manual D07-00-023 Rev A02 Page 98 of 107 Go back to top 11.5 PDH Functions > Round Trip Delay Tapping the Round Trip Delay the PDH Functions screen. The PDH Round Trip Delay is the same measurement as for the SONET Round Trip Delay described.

  • Page 99: Ds1 Loop

    TX150 e-Manual D07-00-023 Rev A02 Page 99 of 107 12.1 DS1 Tools > DS1 Pulse Mask This function captures and analyzes DS1 (1.544Mbits/s) pulse shape. The purpose of maintaining the correct pulse shape is to reduce inter-symbol interference – if the logic 1s and 0s cannot be detected by the receiver correctly, bit and code errors will result.
  • Page 100 TX150 e-Manual D07-00-023 Rev A02 Page 100 of 107 Loopback Control: Tab the Loop Icon locate on top of screen to select Up (Loop Up) or Down (Loop Down). Loop Up: 1. send a known test pattern and check if the pattern is received. If received, declare “pre-exist loop” and stop.
  • Page 101 TX150 e-Manual D07-00-023 Rev A02 Page 101 of 107 Go back to top 13.0 DS3 Tools The DS3 Tools can be found on the main menu. Tap the DS3 Tools icon to display the shortcut screen shown below. 13.1 DS3 Tools > DS3 Pulse Mask This function captures and analyzes DS3 (44.736Mbits/s) pulse shape.
  • Page 102 TX150 e-Manual D07-00-023 Rev A02 Page 102 of 107 - Left/Right button: To move the pulse mask to left or right direction, press the left or right button first and re-run the test. Go back to top 13.2 DS3 Tools > FEAC DS3 FEAC responses (Far End Alarm and Control Channel Responses): Enabling this option allows loop-back to be configured from any “far-end”...
  • Page 103 TX150 e-Manual D07-00-023 Rev A02 Page 103 of 107 DS3 LOS DS3 OOF DS3 AIS RCV DS3 IDLE RCV DS3 EQUIQ FAIL(NON-SERVICE AFFECT) COMMON EQUIP. FAIL (NSA) MULTIPLE DS1 LOS DS1 EQUIP FAIL SINGLE DS1 LOS DS1 EQUIP FAIL(NON-SERVICE AFFECT) 11.3 DS3 Tools >...
  • Page 104 TX150 e-Manual D07-00-023 Rev A02 Page 104 of 107 To save a new profile from the PDH/DSn or SONET applications mentioned above, select the 'Save as New' pull down option. This will bring up an alpha-numeric keypad to name the profile. When the profile is saved, all of the test configurations that apply to the particular application (PDH/DSn or SONET) are saved.
  • Page 105 TX150 e-Manual D07-00-023 Rev A02 Page 105 of 107 Go back to top 15.3 Files Please refer to: Common Functions E-Manual Go back to top 15.4 Help Please refer to: Common Functions E-Manual Go back to top 15.5 Backlight Please refer to:...
  • Page 106 Replace the hardware which prove to be defective provided that the products that the customer elects to replace is returned to VeEX Inc by the customer along with proof of purchase within thirty (30) days of the request by the customer, freight prepaid.
  • Page 107 TX150 e-Manual D07-00-023 Rev A02 Page 107 of 107 Customer Care Phone: + 1 408 970 9090 Email: customercare@veexinc.com Go back to top...

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