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T1 E1 Basic and Optional Applications
w/ Buyers Guide

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Basic application are included with T1 E1 Basic Software


T1 E1 carriers are still used extensively throughout the world for carrying large volumes of call containing both voice and data. Their popularity can be attributed to their high reliability, manageability and flexibility. The available digitized channels, 24 for T1 and 32 for E1 carry voice and/or data. Further, the channels can be used separately or they can be combined to provide higher transmission bandwidth.

T1 E1 testers are available in various form factors from portable, handheld, and rack-based platforms. Regardless of the form-factor you choose, GL’s T1 E1 Test solutions provide a wide range of functionalities and testing capabilities. GL’s versatile T1 E1 Analyzer Hardware portfolio is briefly discussed in this webpage - Here we discuss a wide range software supported in GL’s T1 E1 test tools required for installing, commissioning and troubleshooting T1, E1, FXO, FXS, and Datacom lines.

Basic Applications (Included with T1 E1 Basic Software)

T1E1 Line Interface Options

Provides options for configuring Framing formats, Loopbacks, Connection modes, and Clock modes.

  • Framing Formats
    For T1 systems supports the following framing formats: 193S (D4) Framing Format and 193E (ESF) Framing Format
    For E1 systems supports the following framing formats: Channel Associated (CAS), Common Channel Signaling (CCS), and Unframed Mode for E1
    Visit the Framing Formats page to know more.
  • Tx Rx Configurations
    Various options have been provided to control the frame transmission and receiving behavior, which includes configuring duty cycle, transmitting all-ones, adjustable transmit clock frequency, onhook / offhook signaling, multi-frame sync criteria, alarm indications, and so on.
    Visit the Tx Rx Configurations page to know more.
  • Clock options: Internal, External, & Recovered
    PCI based T1/E1 have 3 clock options to choose. With internal clock option the transmit section is clocked using an internal oscillator. For recovered clock option the transmit section is clocked using the clock derived from the received signal. If no received signal is present the internal clock is used. An external clock can be provided at the SMB input of the Cards or Dual USB Units. A TTL or CMOS level is acceptable. Apply a 1.544 MHz clock for T1 or a 2.048 MHz clock for E1.
    • Inward framer loop-back (Inward Loop-back (F))
    • Inward driver loop-back (Inward Loop-back (D))
    • Outward driver loop-back (Outward Loop-back (D))
    • Cross-port Through mode
    • Cross-port Transmit mode
  • Connection Options: Terminate, Bridge, Monitor
    The input signal (the signal connected to the "T1/E1 In" jack) may be terminated using impedance, monitored, or bridged depending on user requirements.

  • Encoding Options
    The companding (A and µ) laws are used for Audio level compression, which is used for many purposes as explained below:
    The mu-law algorithm (µ-law) is a companding algorithm, primarily used in the digital telecommunication systems of North America and Japan. It is similar to the A-law algorithm used in Europe. The default encoding used by T1 is Mu-Law (µ-law).

    An a-law algorithm is a standard companding algorithm, used in European digital communications systems to optimize, i.e., modify, the dynamic range of an analog signal for digitizing. The default encoding used by E1 is A-La

Monitoring Applications

The T1 (E1) analyzer boards provides in-service monitoring of T1 (E1) circuit connections, alarms, frame errors, sync loss, bipolar violation signals, including received frequency, received signal level, data bytes, and DC offset. Also included are applications such as oscilloscope and spectral display to graphically analyze signals. The T1 (E1) analyzer boards emulates and decodes all 24 (32) channels simultaneously for Signaling Bits, Power Level, Frequency, and Multi-Frame Data. VF interface for monitoring and inserting audio with Drop and Insert are also provided.

  • Monitor T1/E1 Line Status

    This application displays the T1/E1 line conditions for all the T1/E1 ports. You can monitor line sync loss, HDB3 violation, carrier loss, frame error, distant MF, alarm indication signal (AIS) and ES overflow/underflow in case of E1, and line sync loss, BPV, carrier loss, frame error, blue alarm, yellow alarm, alarm indication signal (AIS) and ES overflow/underflow in case of T1. Additionally, the application allows users to monitor the T1/E1 line conditions such as frequency, the power level and clock (or frame/bit slips) slips.

  • Monitoring VF Interfaces

    • VF Input/Output Interfaces for T1 / E1 Products
      GL's T1/E1 Analyzer products are equipped with VF inputs and outputs via 3.5 mm connectors. Primary functionality of these connectors is to connect to external equipments or accessories. Input signal is digitized (at 8 kHz, uLaw/A-Law/pcm16) and inserted into selected timeslot of T1/E1. Higher sampling rates (16 kHz for 16 bits) are under development.

    • 4-Wire VF Interface with Drop & Insert
      This application permits any single timeslot to be decoded to the VF Output jack, i.e. the PCM signal in a timeslot is converted to analog and fed to the VF Out jack. This signal can also be fed to an onboard speaker. The VF Dialog Bar also allows you to control the gain of the signal.
  • Extensive Use of Graphics for Rx Signal Monitoring

    • Bytes Values Display for all time slots

      This box displays the data values for each time slot in HEX data format. These values will be changing very rapidly, as each timeslot's data rate is 8000 bytes/sec.

    • Binary Byte Values Display for all time slots.

      This box displays the data values for each time slot in binary data format. These values will be changing very rapidly as each timeslot's data rate is 8000 bytes/sec.

    • Monitor signaling bits

      The signaling bits associated with each timeslot are displayed in real-time.
      For T1 cards, the received signaling bits A and B for 193S (D4 Framing Format) and A, B, C, and D for 193E (ESF Framing Format) are displayed for all channels.
      For E1 Cards, this application should be used in CAS mode only. The signaling bits A, B, C, and D are displayed for all channels. These bits are demultiplexed from timeslot 16.

    • Power Level Display for all time slots

      The rms (root-mean-square) value of the digital codewords (after expansion from µ-Law or A-law) for each timeslot is computed and continuously displayed in dBm. The number of samples used in the computation is 192.

    • DC Offset Display for all time slots

      The DC Offset application provides the capability to measure and display DC offsets for all timeslots. Multiple instances of this application may be opened simultaneously to monitor DC offsets on more than one GL card.

    • Frequency Display for all time slots

      A continuous display of the signal frequency in each timeslot is displayed. The frequency is computed using the zero-crossing rate of the samples from each channel. The number of samples used in the calculation is 4000.

    • Multiframe Byte Display

      This application permits viewing of complete multiframes. Approximately one second of data is captured, or 682 multiframes in T1 ESF/193E, 1364 multiframes in T1 D4/193S, 1024 multiframes for E1. The data is displayed with each frame identified. For T1 systems, twelve (12) frames are displayed per multiframe in D4 (193S) framing format, and twenty-four (24) frames in ESF (193E) framing format. For E1 systems, 16 frames are displayed per multiframe.

    • Real Time Multiframe Monitoring

      This application permits viewing of multiframes in real-time. The data is refreshed for about every second. For T1 systems, twelve frames are displayed per multiframe in D4 (193S) framing format. Twenty-four (24) frames are displayed in ESF (193E) framing format. For E1 systems, 16 frames are displayed per multiframe.

    • Real Time Bitmap Monitoring

      This application permits a graphical view of complete multiframes as a real-time bitmap. A snapshot of several multiframes of data is obtained at a given instance and the view is rendered as a pixel map with zeros represented by white dots and ones represented by black dots.

    • Time Slot Byte Display

      This window displays the timeslot value for about '1' second duration for a desired timeslot. Ability to change the particular timeslot is also provided. "New Buffer" button allows refreshing of the data. The "Timeslot Window" module differs from "Multiframes" module, in which all the multiframes for a particular timeslot are displayed.

      Data of about one-second duration is displayed. In "Multiframes",
      T1 D4/193S: 1364 multiframes are displayed
      T1 ESF/193E: 682 multiframes are displayed
      E1: 1024 multiframes are displayed

    • ASCII Timeslot Display

      This application permits viewing of real-time ASCII events that are present on the T1 or E1. The ability to display the ASCII events for a particular port and timeslot is provided. Each event is properly time-stamped for tests that require time correlation. Logging real-time events to the hard drive is also possible; this is useful during overnight or long-term testing.

    • Real Time Oscilloscope Display of DS0

      The PCM codes (amplitude of the incoming signal) of any selected timeslot are displayed in real-time graphically as a function of time. Timeslot selection and time base can be changed either to view different incoming timeslots or modify the duration of the display. The time base can be adjusted from approximately 0.005 sec full scale to 1.000 sec full scale. This application can be used to visually assess activities on the channel such as noise, tone, speech, etc. The data may be displayed for all signaling formats – alaw, mulaw, pcm16, pcm13, pcm14, pcm8, and different byte order for INTEL (Little Endian), and MOTOROLA (Big Endian).

    • Real Time Power Spectral Display of DS0

      The data received on a specified timeslot can be viewed in the spectral domain (spectral amplitude Vs frequency). A Fast Fourier Transform (FFT) is applied to successive sample sets of the incoming data and displayed in graphically. Adjust the frequency resolution by the FFT length (from 32 points to 8192 points). The data can be smoothed to lessen the effects of truncation by applying Hamming, Hanning, Harris, Blackman, Triangular, or Rectangular filter windows.

    • Audio Monitoring

      Audio monitoring allows the control of VF output (speakers) of all T1/E1 cards connected to a PC under a single program. This application permits the combined display of all T1/E1 cards speakers in the PC and thereby facilitating the user a single application for all speaker controls.

    • Active Voice Level Monitoring

      The Active Voice Level Monitor computes the Active Voice Level of a signal according to the ITU-T P.56 specification, Method B. This analyzes the source signal in real-time from T1/E1 timeslots, or process the captured signal data files offline. This application is available under the Monitor Menu in T1/E1 analyzer software

    • Pulse Mask Compliance Testing (Available only with tProbe™ and Universal HD T1 E1 cards)

      In T1 E1 transmission systems, signals are dropped, inserted, and accessed at the electrical level at a point called DSX patch panel or at some similar point. To reliably receive, monitor, or access these signals, they must first conform to a standard that establishes parameters such as pulse width, rise time, amplitude, allowable undershoot and overshoot. If the pulse meets the pulse mask, then a properly designed receiver should be able to decode the bits transmitted.

      GL's Universal T1 E1 Cards provides pulse mask compliance testing using Pulse Mask Display for both T1 and E1 applications. Software has been developed to determine if the pulse shape fits within a "pulse mask" as specified by standards ITU G.703 and ANSI T1.102-1993. The software is available in both visual and tabular formats. Tabular formats are convenient for automation and scripted test environments.

    • Jitter Measurement (Available only with tProbe™ and Universal HD T1 E1 cards)

      Jitter along with wander and frequency drift are major impairments of clocks in synchronous systems. Jitter is the time discrepancy between the time of arrival of a clock pulse and its theoretical arrival time. GL's Jitter Measurement module allows evaluation of jitter on either a tick-by-tick or a cumulative basis. Cumulative jitter is of primary importance as network equipment must cope with the cumulative jitter by the use of appropriately sized “jitter buffers”. Tick-by-tick measurements provide instantaneous jitter.

    • Real-time strip chart software

      Real-time Strip Chart option allows users to capture and analyze signaling as well as PCM data captured at a specified timeslot.

    • Real-time Multi-Channel Audio Bridge

      The Multi-Channel Audio Monitor is an optional (XX017) application available with the T1/E1 Analyzer. Audio monitoring application allows users to insert speech on T1/E1 lines using microphone and listen to the speech on T1/E1 lines using speaker (requires internal or external sound card to be connected to the PC).
      The speech can be inserted or extracted on selected T1/E1 card, channel and sub channel. It supports A-law, Mu-law, G.726 40 Kbps, 32 Kbps, 24 Kbps, and 16 Kbps data rates. Optional Mono and Stereo audio modes are also available.

    • Capture Dialed Digits (DTMF / MF/ MFR2-f/ MFR2-B Detection)

      The Capture Dialed Digits application provides the capability to capture and display DTMF and MF (along with MFR2-forward and MFR2-backward) digits as they are received on one or several time slots.

    • Signaling Transitions Recording

      This optional software provides time-stamped indications of all signaling bit changes. The application works with one or multiple Ultra T1/E1 Cards or with the Single or Dual USB T1/E1 Analyzers. Signaling bit changes are recorded for all timeslots simultaneously.

Intrusive Testing Applications

A variety of standard data patterns including static and user defined patterns are available for intrusive testing purposes. The BER Tester generates/detects unframed, framed, and fractional data that are defined in Pseudo Random Bit Sequence (PRBS). Precision Delay Measurement under basic software measures the round trip delay of a system. Measurement is precise and accurate to the microsecond level. Tone / Multiframe / Noise generation, signaling bit manipulation, including error insertion features provide complete signaling ability for T1/E1 analyzer.

  • Full / Fractional T1 and E1 BERT with Drop & Insert

    The BER Tester generates/detects unframed, framed, and fractional data that are defined in Pseudo Random Bit Sequence (PRBS). In addition to these, drop and insert capability is provided. A variety of standard data patterns are available for test purposes including static User defined patterns" as this option is not allowed in BERT.

  • Enhanced Multi Channel Bit Error Rate Tester

    The Enhanced Bit Error Rate Tester measures the correctness of data received on T1/E1 lines according to the repetitive pattern file for a given transmission. The application also supports sub-channel selection (fractional BERT within a timeslot) for finer control of testing on individual bits. This performs the error test on multiple cards simultaneously along with graphical view of time Vs error.


    ATM Bit Error Rate Test (BERT) application permits BER testing over ATM layer. The application allows Traffic generation and verification, Bit Error Insertion, Looping back incoming traffic, and configuring ATM headers for UNI & NNI interfaces. The application is capable of testing Pseudo Random Bit Sequence (PRBS) patterns, all ones, all zeroes, alternate ones & zeroes, 1:1, 1:7, and user-defined bit patterns. In addition, single bit error insertion, auto error insert rate from 10-2 to 10-9, invert & non-invert selections, and scrambling options are provided.

  • Precision Delay Measurement

    Precision Delay Measurement measures the Round Trip Delay of a system. Sending a BER pattern with the insertion of an erred bit and timing the reception of the erred bit do the Round Trip Delay measurement. Measurement is precise and accurate to the microsecond level. A delay up to 8 seconds can be measured. The internal delay of the card is subtracted from the round trip delay.

  • Tx_Rx Loopback

    This application is for diagnostic purposes only. It loops all the receive data from all timeslots back to the transmitting port. It is used in conjunction with a Bit Error Rate Test to verify the operation of Cards and USB units.

  • Error Insertion

    The Error Insertion application permits single, fixed, automatic, and random error insertion into the incoming bit stream. Bulk delay is an added feature in Error insertion application (applicable only to USB Analyzers), that allows users to apply delay on the entire T1/E1 trunk (full multi-frame) of 1.544Mbps (T1) pipe or 2.048 Mbps (E1) pipe.

  • Windows client server scripted control test and simulation software

    Client / Server applications allow the user (with an appropriate client) to operate analyzers remotely, write scripts for automation, or provide multi-client connectivity to a single T1 E1 VF Data analyzer. Almost every GUI application has a WCS counterpart. Now, Windows Client / Server available as a part of basic T1/E1 Analyzer software. GL provides sample-working clients in C++, VB, and TCL along with the server. With additional licenses, various modules are supported by WCS application. T1/E1 Cards in a Server are easily controlled through software Clients at remote or local sites via TCP/IP sockets. Connectivity can be via Dial-Up, LAN, WAN, or more typically the Internet. Server software can run multiple tasks simultaneously at the request of the Client software. Server software runs under Windows® 7 and above.

  • Dual VF Tx Rx

    The Dual VF Tx Rx (earlier called as Simplified Audio Client) is now a part of Basic Applications in T1/E1 Analyzer. This application is designed exclusively to perform non-intrusive and intrusive VF audio monitoring, VF audio recording, and testing easily. SAC provides an alternate & simple GUI as against the T1 E1 Analyzer applications in basic software to perform analog Tx/Rx functions.

  • HDL File Conversion Utility

    This application converts a file from Ethereal format files (.PCAP, .CAP, and .PCAPNG) to GL proprietary file format (.HDL) and vice-versa. The application can automatically detect the format of the source PCAP file whether it is captured on Linux or Windows® and converts accordingly to HDL file. By converting the file to *.HDL format, the users can use the converted *.HDL files in T1 E1, T3 E3, LightSpeed1000™, or PacketScan™ applications to decode and analyze.

  • Transmit Dialed Digits (DTMF / MF/ MFR2-f/ MFR2-B Generation)

    The Transmit Dialing Digits application provides the capability to transmit DTMF, MF, MFR2-forward, MFR2-backward as well as transmitting signal data from files or from the GL board's VF input, applying signaling bits control, and performing other functions related to call establishment, progress, and termination.
  • Jitter Generation

    This application allows the user to generate a jittered output T1 E1 signal with user-selected jitter frequency and amplitude. It is suitable for testing jitter tolerance and compliance with standards such as G.823. Jitter Generation in conjunction with Jitter Measurement application, may also be used to test jitter transfer.

Optional Hardwares with tProbe™ T1/E1

  • tProbe™ Analog Terminal (FXO) and Network Port (FXS) Tester

    The FXO and FXS board is available as an optional board with GL’s tProbe™ T1E1 Analyzer USB unit. The FXO and FXS ports on tProbe™ allows to simulate all of the above features. Also, the FXO port on the tProbe™ permits non-intrusive capture and analysis of voiceband signals from a two-wire telephone line. The FXS port on tProbe™ emulates a two-wire FXS service such as a telephone wall jack.
  • Datacom Analyzer

    GL's Datacom Analyzer is also an optional board available with GL’s tProbe™ T1E1 Analyzer USB unit. The portable tProbe™ T1 E1 and Datacom Analyzer is designed for the service installation, verification, and maintenance of data communications and telecom equipments. The Datacom Analyzer supports V.24, V.35, V.36, RS-449, RS-485, EIA-530 and EIA-530A interfaces and can be configured as DTE or DCE to test Channel Service Unit (CSU) and Data Service Unit (DSU) entities.

Optional Applications

Record/Playback Applications

  • Synchronous Trunk Record/Playback (or STRP)
    GL’s Synchronous Trunk Record/Playback (or STRP) application has both Record and Playback features that permits the user to synchronously record any type of traffic (voice, digits, and tones) on multiple complete T1 or E1 lines (trunks) with accurate timestamp. Playback of some or all of the recorded data permits the user to recreate the transmission exactly as it occurred.

  • Record / Playback Disk Files

    This optional software permits the user to transmit and or capture any signal on T1 or E1 lines with GL's T1/E1 Cards or USB T1/E1 Units. Typical applications include transmission or capture of prerecorded video files, traffic loading applications and protocol analysis.

  • Record from multiple cards

    This application permits capture of data being transmitted on (any one or both) T1/E1 cards to a file.

  • Automated Record Playback

    The 'Automated Record/Playback (ARP)' application is an extremely versatile and rugged application incorporated in T1/E1 analyzer that makes it very easy for the user to run several transmit or receive operation tasks simultaneously.

  • Automated Continuous Capture

    Automated Continuous Capture (ACC) allows users to capture different types of data (*.ala, *.ula, *.pcm, *.wav, *.ber) continuously into different files. Instead of capturing data from a card in one big block, it is possible to capture seamless chunks of data in files of the specified size, or specified time limit of capture.

  • Transmit/Receive File Utility

    The Transmit/Receive File Utility allows transmission and reception of files to/from t1 or e1 lines with greater flexibility than the Record/Playback Software. The optional Record/Playback software runs as a feature under the T1/E1 GUI application software.

  • Multichannel BERT

    MCBERT (MultiChannel Bert) provides on-line and offline measurement of correctness of data received on T1/E1 lines according to a repetitive pattern file.

Call Capture and Analysis

  • Call Capture and Analysis (Full Duplex Capture w/ Dual Unit)

    The T1/E1 Call Capture and Analysis Software (XX031) provide the capability to non-intrusively record calls directly from T1/E1 lines. The call capture can be done manually or auto-triggered based on ISDN/SS7 messages, signaling, traffic such as - voice, digits, tones, fax, modem, and any signal based on power-level.

  • Call Data Record (CDR)

    The T1/E1 Call Data Record Software (CDR032) compiles the output of CCA (Call Capture and Analysis) application and (optionally) VBA (Voice Band Analyzer) application and generates Call Summary and Call Detail types of reports. CDR provides comprehensive information on each and every call occurring on T1 and E1 lines, including - voice capture, signaling information, alarms and errors occurring during the call, voiceband event information, and categorization of the call as voice, fax, modem, or data.

  • Near Real-time Voice-band Analyzer

    The Near Real-time Voice-band Analyzer (VBA) is an analysis tool for monitoring voice band network traffic over VoIP, TDM and wireless networks. Built-in algorithms include ITU-T P.56 Active Voice Level analysis, Line Echo (Hybrid) analysis, and Traffic Classifier. It supports A-Law, µ-Law, 16-bit PCM (Intel), 16-bit PCM (Motorola) and MS Wave file formats. FaxScan™ module within VBA can be used to decode both 2-wire and 4-wire voice band captures to produce the Fax TIF image and other transmission information.

  • Voice Call Management Utility

    GLs' Call Management Utility (CMU), coupled with the GLs' T1/E1 Call Capture and Analysis (CCA) application, provides all the necessary management tools to perform exactly this function.

  • Multiple Call Capture and Analysis

    GL’s Multi CCA application is similar to CCA, where in it is used to monitor hundreds of calls, capture the bidirectional data, signaling and traffic, simultaneously from multiple T1/E1 lines, based on the user-defined trigger configurations. Once the capture trigger type is selected, users can control and run multiple capture instances on different T1/E1 ports from a single GUI.

  • CCA along with CDR and VBA allows monitoring IVR systems for voice and data quality

Windows Client-Server based Applications

  • WCS based various Simulation Modules (XX600 Included with Basic Analyzer)

    Client / Server applications allow the user (with an appropriate client) to operate analyzers remotely, write scripts for automation, or provide multi client connectivity to a single T1 E1 VF Data analyzer. Almost every GUI application has a WCS counterpart. Now, Windows Client / Server available as a part of Basic Applications in T1/E1 Analyzer. GL provides sample-working clients in C++, VB, and TCL along with the server.

    With additional licenses, WCS also supports transmission/reception of files/digits, Multi-channel BERT, CAS Emulation, DSP operations, Dynamic DSP capability, SA Bits/ FDL/ HDLC/ TRAU/ MC-MLPPP/ SS7/ ISDN TxRx/ Multilink-Frame Relay Emulation to name just a few. 

    Various protocol decode agent modules are supported by WCS application.

  • Fax Emulation

    This optional software uses simple commands to transmit and receive the fax information as electrical signals through the T1/E1 (telephone system). The contents (text or images) are sent as a single fixed graphic image, converting it into a bitmap. The receiving end reconverts the coded image and creates a copy of the document. It supports almost all FAX standards such as V.17, V.27, V.29, V.33, and V.34.

  • MAPS™ ISDN Emulator, SS7 Emulator, GSM A Interface Emulator, GSM Abis Interface Emulator, MAP Emulator, CAS Emulator, APS Emulator, FXO-FXS, CAP Emulator, MLPPP Emulator

    GL's Message Automation & Protocol Simulation (MAPS™) is a powerful Protocol Test platform-supporting a wide range protocols such as SS7, ISDN, GSM, CAS, APS, MLPPP, MAP, FXO-FXS, CAP and more. This message automation tool covers solutions for both protocol simulation and protocol analysis. The application includes various test plans and test cases to support the testing of a required real-time scenario. Along with automation capability, the application gives users the unlimited ability to edit messages and control scenarios (message sequences). "Message sequences" are generated through scripts.

Echo and Delay Test Solutions

  • Echo Mitigation System (Currently implemented in Octal T1/E1 Analyzer)

    Echo Mitigation System (EMS) solution allows simulate transmission of test signals to an endpoint, receive the test signals from the other end, identify the parameters of the echo/delay/offset from the received signal, and then apply an echo mitigation process based on these parameters. EMS can be deployed on the backhaul system to eliminate the varying delay/echo resulting from different backhaul technologies used to transport audio through the system.
  • Measure Loopdelay/ERL Feature

    The Measure Loop Delay/ERL application provides the capability to measure and display loop delay and echo return loss (ERL) on one or more time slots. Multiple instances of this application may be opened simultaneously, allowing measurements to be taken on multiple timeslot ranges and measurement strategies.

  • Delay Attenuate Timeslots

    This application allows you to apply delay, attenuation, and/or filtering to a received signal on any number of timeslots.

  • Delay/Attenuate-Single Channel (Only for HD Cards & USB Portable T1/E1 Analyzers)

    Delay/Attenuate Timeslots - Single Channel Application is an addition to the already existing Echo Test Solutions suite of applications. This application also facilitates Low Delay Echo Path Modeling. This application also allows you to apply; delay, attenuation (gain), and/or filtering to a received signal on a single timeslot. You may also mix-in additional signals from other sources, including speech signals inserted via VF input. Speech signals inserted via VF input and Gaussian noise signals or Tone generated internally within the application.

  • Digital Echo Canceller Simulator

    Digital Echo Canceller is a G.168-2000 and G.165 compliant Echo Canceller. The DEC is licensed software that is shipped as a Windows DLL.

  • GLC View waveform viewer

    GLC View is a waveform viewing application. It has been designed specifically as a companion application for the GL Communications Inc. T1/E1 Echo Canceller Test Suite.

  • Audio Processing Utility (APU)

    Audio processing utility is a pre-processing application used for manipulating the input audio (tones, and voice) files with impairments such as delay, noise, acoustic echo, line echo, and double talk. An echo file is generated if a corresponding line or acoustic echo filter is specified.

  • G.168 Echo Canceller Test Suite for T1 & E1 Systems

    GL offers a wide range of G.168 echo canceller compliance testing and measurement software applications to handle everything from quick testing and verification to testing of very complex scenarios involving large networks. These applications can be used to simulate speech, add background noise, and measure delays through a variety of network configurations, including conventional telephone networks, networks with satellite connectivity, and wireless networks.

    Solutions offered by GL include, Monitoring of Hybrid and Acoustic Echo and Voice Quality, EC Performance Testing & Live Monitoring, Accurate Field Characterization of Echo Paths, Impulse Responses, Delay, and Loss Statistics, Field Measurement of Echo Return Loss and Echo Loop Delay, EC Compliance Testing per G.168 Using Manual Method, Fully Automated Method, & Semi-Automated and Scripted Method, Testing Developmental EC Software (w/o Hardware), and End-to-End Subjective Testing.

  • Voice Quality Test Solutions per G.160 and G.169

    Voice Enhancement and Voice Quality Test software is designed to test the functionality of the voice enhancement devices per G.160, including the voice improvement tests per P800/P861/P862, noise reduction tests, automatic level control tests, and noise compensation tests. VQT (voice quality test) parameters, PESQ and POLQA are graphically presented to display test results.
    Few solutions include Voice Quality Test Solutions and Voice Enhancement Device Test Per G.160 and G.169.


Protocol Analyzers and Emulators

  • Physical Layer Analyzer

    The Physical Layer Analyzer application monitors the T1 E1 or T3 E3 Alarms in real-time, converts them to SNMP messages and sends them to the Network Operations Center (NOC). ON/OFF status in the Physical Layer Analyzer depicts the Alarm/No Alarm state respectively. SNMP DS1/DS3 Traps sent from T1/E1 or T3/E3 Physical Layer Analyzer can be monitored on the configured IP Address and UDP Port using any SNMP or MIB browser.  When the alarm status changes, then SNMP Traps will be sent to the NOC.
  • Protocol Identifier

    The Protocol Identifier application can identify various protocols carried on T1 or E1 lines. It is capable of detecting protocols such as ISDN, ATM, HDLC, MTP2, LAPD, SS7, PPP, GSM, GSM Abis, TRAU, and Frame Relay. The timeslots and the subchannels within timeslots are also identified. Once identified, detailed analysis can be carried out by individual Protocol Analyzers. This application is helpful in identifying traffic types at a concentration point, DSX patch panel, or multiplexed facility.

  • Protocol Analysis

    GL's protocol analyzers can be used to diagnose signaling problems quickly and effectively by analyzing traffic on multi-protocol signaling networks. It monitors signaling interactions in fixed, access and wireless networks. It analyzes multiple protocols like Physical Layer Alarms & Errors, HDLC, DDS, Frame relay, SS7, ISDN, TRAU, ATM, GSM, GPRS, GR-303, CDMA 2000, E1 Maintenance Data Link, V5.x, ML-PPP, UMTS, Facility Data Link for T1, and SS1. It can make measurements on up to 32 duplex time slots from up to 4 duplex E1 or T1 trunks. It also allows measurements on Ethernet based traffic. GL's protocol analyzer can be easily configured to capture fractional E1 or T1 (DS0), sub-channels, hyper-channels and more.

  • Protocol Emulation

    GL's powerful emulation tools in T1E1 analyzer help you simulate network side or user – side of the network and test equipments for proper functioning. A variety of protocols such as HDLC, FDL, ISDN, TRAU, SS7(ISUP, MAP), CAMEL AP (CAP), SS1, SA-bits HDLC, Multi-link Frame Relay, ATM-IMA, GSM A & Abis, MLPPP, MLPPP Conformance, CAS and more are supported through GUI based as well as client-server based emulation tools.

  • DCME Analyzer

    The DCME Analyzer is a PC-based system using GL's Ultra E1 Card to connect non-intrusively to the bearer side of DCME equipment. Both real-time and post-processing of the bearer signal is possible.


Network Surveillance System

T1/E1/T3/E3 Probes are deployed in the field to monitor various protocols (including ISDN, SS7, GSM, CDMA, and others) and conditions. These probes can process protocol information at varying levels (intelligent software) to extract information of choice, export these information to a central database, and communicate with the NMS through TCP / IP. Data records are stored into a centralized database (Oracle) using ODBC. With the use of web server, the remote / local monitoring can be accessed using simple web browser interface such as NetSurveyorWeb™.

Digital T1 E1 Line Monitoring System

The NetSurveyorWeb™ for T1E1 Physical Layer provides an instant overall graphical view of the health of the TDM network with drill down to individual lines; secure access through WEB; remote monitoring and diagnostics to troubleshoot any T1 E1 line; and a central database and applications for controlling, collecting, and analyzing the information provided by the various probes.

For more details, visit Digital T1 E1 Line Monitoring System

Fax & Modem Analysis Software

  • GLInsight™

    GLInsight™ is a state-of-the-art system that provides promptly processed information and analysis of data collected on IP and PSTN networks. Decoded results are analyzed on a per-network basis. Alternatively, data from two networks can be combined to provide additional insight into the networks’ behavior. 

  • Fax Analysis (FaxScan™ for 2-Wire, 4-Wire, & IP)

    FaxScan™ is GL's command-line Fax decoder/demodulator application used to analyze the recorded voice band traffic (PCM stream & PCAP files) for Fax traffic. It provides analysis of the T.38 packets, T.30 frames, general call-flow indicators and decoded fax image in TIFF-F format. FaxScan™ is also available as a licensed module along with GL's Voice Band Analyzer (VBA) for processing 2-Wire or 4-Wire captures.

  • Fax Emulation

    This optional software uses simple commands to transmit and receive the fax information as electrical signals through the T1/E1 (telephone system). The contents (text or images) are sent as a single fixed graphic image, converting it into a bitmap. The receiving end reconverts the coded image and creates a copy of the document. It supports almost all FAX standards such as V.17, V.27, V.29, V.33, and V.34.


  • Application Development Tool Kit

    GL's Application Development Toolkit provides application programming interface (API) for custom T1/E1 software development. GL now provides API for Windows® and Linux Operating Systems. The Windows® toolkit consists of C and C++ header files, a 32-bit dynamic link library (DLL) implementing API, programmer's guide and reference manual and examples of custom applications.

  • Multiplex/Demultiplex

    GL's Mux/Demux software provides the capability to multiplex individual timeslot files into one aggregate output file and the reverse process of demultiplexing one aggregate file into individual timeslot files. The user enters the output file format, which can be any number of channels from 2 to 24 for T1 or 2 to 32 for E1. Reverse incident occurs for demultiplexing option. While multiplexing a frame is created with one byte from each input file. This is stored to the output file. The process is repeated until all bytes from input files are used.

  • Voice Quality Assessment

    Voice Quality Assessment tool is used for clear, uninterrupted voice for all types of networks carrying voice traffic. Typical network applications include VoIP systems, PSTN, ATM networks, Frame Relay, and Wireless Networks.

  • T1/E1 Traffic Classifier

    GL's Traffic Classifier application can analyze the traffic on a T1 or E1 line. It can analyze and classify various traffics such as voice, fax, data, tones (dial tone, ring-back tone, busy tone etc) as well as identify dialing digits and other events happening on a T1/E1 network.

    It provides non-intrusive, real-time monitoring and classification of T1 and E1 traffic. It can classify one or more T1/E1 lines located locally or remotely. The traffic is monitored in real-time for 16 different traffic types including silence, voice, a variety of data modulations, fax modulations, DTMF digits, and call progress signals. Classification can be done on selected timeslots across multiple T1/E1 lines. A multi-channel strip chart display shows traffic types and durations using a configurable color scheme. An off-line feature can playback or fast forward through previously recorded and classified traffic data.


With Basic Software:

Monitoring Applications

Intrusive Test Applications


With Optional Software:


WCS Modules:

Buyer's Guide

Please Note: The XX in the Item No. refers to the hardware platform, listed at the bottom of the Buyer's Guide, which the software will be running on. Therefore, XX can either be ETA or EEA (Octal/Quad Boards), PTA or PEA (tProbe Units), UTA or UEA (USB Units), HUT or HUE (Universal Cards), and HDT or HDE (HD cards) depending upon the hardware.

Item No. Item Description
XUT001 XUE001
Dual T1 E1 Express (PCIe) Boards (requires additional licenses)
Dual T1 E1 Express Card Basic T1 Software (includes xx600, xx605)
Dual T1 E1 Express Card Basic E1 Software (includes xx600, xx605)
QuadXpress T1E1 Main Board (Quad Port– requires additional licenses)
OctalXpress T1E1 Main Board plus Daughter Board (Octal Port– requires additional licenses)
Basic Software for T1 (includes xx600, xx605) (zero dollar, but required with appropriate licenses)
Basic Software for E1 (includes xx600, xx605) (zero dollar, but required with appropriate licenses)
XX003 Timeslot Delay Loopback for T1 (Currently implemented in Octal T1/E1 Analyzer)
Timeslot Delay Loopback for E1 (Currently implemented in Octal T1/E1 Analyzer)
Dual Laptop T1/E1 Hardware USB Base Unit
Basic Laptop T1 Software (includes xx600, xx605)
Basic Laptop E1 Software (includes xx600, xx605)
High Stability Internal Clock Option
HD Universal Dual T1/E1 Card
HD Universal Card Basic T1 Software (includes xx600, xx605)
HD Universal Card Basic E1 Software (includes xx600, xx605)
High Stability Internal Clock Option
tProbe™ T1 E1 Base Unit
tProbe™ Basic T1 Software (includes xx600, xx605)
tProbe™ Basic E1 Software (includes xx600, xx605)
High Stability Internal Clock Option
w/ 2Wire FXO and FXS Optional Board
w/ Data Communications Optional Board for RS-232, RS-449, RS-422, RS-423, EIA-530,
V.35 Interfaces
  Optional Software
XX010 Application Development Tool Kit
(Programmer's Guide)
XX018 Multi-Channel BERT Software
XX019 Transmit/Receive File Utility Software
XX020 Record/Playback File Software
XX021 FDL Software for ESF (T1 only)
XX022 DTMF/MF Detector & Generator Software
XX023 T1 A-law or E1 µ-law Software
XX051 Synchronous Trunk Record Playback
  Call Capture and Analysis Software Options
XX031 Enhanced T1 / E1 Call Capture/Analysis Software
XX031 T1 or E1 Call Capture and Analysis Software w/ Traffic Activated Trigger Option
CDR032 Call Data Records
CMU031 Call Management Utility
  Voice Band Analysis Software Options
VBA032 Voice Band Analyzer
VBA033 Two-Wire Echo Analysis for VBA
VBA036 Traffic Analysis for VBA
VBA038 Fax Demodulator / Decoder
  Windows Client-Server Software Options
Basic Client/Server Scripted Control Software (Included with Basic Software)
Dual VF Tx Rx (Only for tProbe) (Included with Basic Software)
Pulse Shape & Jitter Measurement (Included with Basic Software)
w/ File based Record/Playback
Transmit/Detect digits (included with basic software)
w/ CAS Simulator
w/ SS1 Signaling Analyzer and Dialer
w/ISDN Emulation
w/ DSP Capability
w/ Dynamic DSP Capability
High Throughput HDLC Tx/Rx Test
High Throughput PPP Tx/Rx Test
High Throughput MC-MLPPP Tx/Rx Test
File based HDLC Record/Playback
File based HDLC Remote Record/Playback
w/ MTP2 Emulation
w/High Throughput TRAU Tx/Rx Test
Scripted ISUP Conformance Testing (MAPS™ SS7 Conformance)
Scripted ISDN Simulator (MAPS™ ISDN)
Scripted ISUP Emulation (MAPS™ SS7)
Scripted MAP Emulation (MAPS™ MAP)
w/ SA bits Encode/Decode
Scripted CAMEL AP Emulation (MAPS™ CAP)
Scripted FXO FXS Emulation using MAPS™ (MAPS™ FXO FXS)
Scripted CAS Simulator (MAPS™ CAS)
Scripted MLPPP Conformance Testing (MAPS™ MLPPP)
Inverse Multiplexing for ATM Emulation
MultiLink Frame Relay Emulation w/ Tx/Rx Test
w/ FDL
w/Multi-Channel Rx BERT
w/Traffic Classifier
SS7 Protocol Decode Agent
ISDN Protocol Decode Agent
Scripted GSM “A” Interface Emulation (MAPS™ GSM A)
Scripted GSM Abis Interface Emulation (MAPS™ GSM Abis)
  Echo and Delay Testing Applications
XX003 Timeslot Delay Loopback for T1 (Currently implemented in Octal T1/E1 Analyzer)
Timeslot Delay Loopback for E1 (Currently implemented in Octal T1/E1 Analyzer)
XX062 Echo Path Delay/Loss Simulation Software
XX063 Echo Path Delay/Loss Measurement Software
XX065 G.168 Test Suite for T1 & E1 Echo Cancellers (Manual Testing Software and Procedures)
XX066 Digital Echo Canceller
XX067 Automated Echo Canceller Testing w/o VQT
XX068 Semi-Automated and Scripted Echo Canceller Testing Suite
w/ C++ Client
w/ LabView Client
w/ Matlab Client
PKB070 Audio Processing Utility
PKB080 Automated Echo Canceller Testing TDM-VoIP
PKB081 Automated Acoustic Echo Canceller Compliance Testing (Partial Tests)
AEC001 AutoEC Test Viewer
EMU037 Echo Measurement Utility (EMU) Software
  Protocol Analyzers and Emulators
XX089 Protocol Identifier
T1 or E1 Real-Time HDLC Analysis/Playback/Simulate Software
Offline/ Remote HDLC Analyzer
E1 Real-Time SA Bit HDLC Analysis
Offline SA Bit HDLC Analyzer
T1 or E1 Real-Time ISDN Protocol Analyzer
Offline / Remote ISDN Analyzer
XX105 T1 or E1 Real-Time ISDN Protocol Emulator
E1 Real-Time V5.x Protocol Analyzer
Offline / Remote V5.x Analyzer
T1 or E1 Real-Time SS7 Protocol Analyzer
Offline / Remote SS7 Analyzer
T1 or E1 Real-Time Frame Relay Protocol Analyzer
Offline/ Remote Frame Relay Analyzer
ML-PPP Analyzer
Offline ML-PPP Analyzer
PPP and MLPPP Packet Analysis
Offline PPP and ML-PPP Packet Analysis
T1 or E1 Real-Time GR303 Protocol Analyzer
Offline/ Remote GR303 Analyzer
CDMA2000 Protocol Analyzer
Offline CDMA2000 Analyzer
T1 E1 Real-Time GSM Protocol Analyzer
Offline GSM Analyzer
w/Motorola Mobis Decode
with Motorola Mobis decodes

T1 E1 Real-Time TRAU Protocol Analyzer
TRAU Traffic Playback
TRAU Toolbox™
Offline TRAU Analyzer
T1 or E1 Real-Time GPRS Protocol Analyzer
Offline GPRS Analyzer
T1 or E1 Real-Time ATM Analyzer
Offline ATM Analyzer
UMTS Analyzer
Offline UMTS Analyzer
  Network Monitoring Software Options

NetsurveyorWeb™ (Perpetual License, Unlimited Users/Nodes)
– Includes Oracle 11g Standard Edition One and Standard Server-Grade Computing Platform

PKV169 NetsurveyorWeb™ Lite
- Probe Level WebServer, PacketScan™, and Oracle 11g Express Edition;
PKV171 NetSurveyor Agent Toolkit
  DCME Related Software Options
DC007 DCME Test & Analysis Software w/Desktop PC
DC008 DCME Test & Analysis Software w/Portable PC
  Miscellaneous Software Options
SA026 "Adobe Audition" Software
SA048 Goldwave Software
SA021 File Edit Software
STE40 Mux/Demux Software
STE50 Sample Traffic Files
  For more detailed information on software, see the Product List
  Recommended accessories for Dual Portable USB T1/E1 Units
SH001 Shipping and Handling, Domestic - Card Only
SH002 Shipping and Handling, Domestic - System with PC
SH002a Shipping and Handling, Domestic; Per System w/ Laptop PC
SH002b Shipping and Handling, Domestic; For Rack PC
SH003 Shipping and Handling, International - Card Only
SH004 Shipping and Handling, International - System with PC
SH004a Shipping and Handling, International; Per System w/ Laptop PC
SH004b Shipping and Handling, International; Per System w/ Rack PC
SH005 Wire Transfer Charge
SH006 Extra Charge for Overnight Delivery - Domestic
SH007 Handling Charge Only
SH008 Certificate of Origin Charge for Shipments to Israel
LOC001 Letter of Credit Fee

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