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PCI Based Dual HD Universal T1 E1 Cards

Overview | Basic & Optional Features | Screenshots
Specifications | Application Notes | API Development Toolkit | Buyer's Guide
T1 E1 Release Notes

T1/E1 Software Ver 7.12.3 is Now Available! Download it here

Applicatin ToolKit for Windows® and Linux Available - click here to know more


The Universal HD T1/E1 is an enhanced PC-Based T1 and E1 solution that utilizes familiar computer user interfaces, to provide comprehensive and versatile T1 or E1 testing capability at a competitive price.


pdf User's Guide
pdf Quick Install Guide
pdf Product Brochure
pdf Frequency Calibration Procedure User Guide
View Presentation
pdf Terminate, Bridge,
Monitor Design-tProbe™
pdf T1 E1 Release Notes
pdf Product List

It is introduced with the following enhancements:

  • Smaller Size – The boards are smaller, with dimensions are 4.2" x 7.1" vs. the older boards 4.2" x 9.2".
  • High Density and High Speed - The boards are significantly faster, and significantly more efficient than the older boards. The new boards use DMA and a 32-bit wide bus.
  • CPU Utilization - CPU utilization with the newer boards is negligible. For example, one can simulate echo on hundreds of timeslots by running simultaneously "delay/attenuate" on all 24 T1 ports on all timeslots. The new boards are compatible with dual processor motherboards and software that simulates dual processors (i.e. hyperthreading).
  • Universal boards have adjustable transmit clock frequency (+ / - 300ppm) for testing frequency lock sensitivity of T1 or E1 equipment.
  • Supports two new port modes: Cross-port through mode and Cross-port transmit mode
  • Features in-service monitoring and emulation of T1 and E1 circuit connections.
  • Provides out-of-service troubleshooting such as bit-error-rate testing, alarm monitoring, signaling bit manipulation and recording, DTMF/MF generation and detection, and Drop and Insert capabilities
  • T1 E1 Pulse Shape and Jitter Measurement Analysis
  • Voice Frequency (VF) Drop and Insert : Besides providing access to in-band PCM data, the T1 (E1) provides VF interface for monitoring and inserting audio with Drop and Insert. Users can connect to VF ports using 3.5mm unbalanced (or mono) audio cable, with standard 600 Ohms termination mode only.
  • VF Tx Gains for Universal T1 E1 analyzer ranges from -7.2 dB dB to +18.2 dB in 0.1dB steps, and VF Rx Gains for Universal T1 E1 analyzer ranges from -18.0 dB to +7.3 dB in 0.1 dB steps.
  • Software Selectable T1 or E1 interfacing along with Drop and Insert
  • Universal boards can be plugged into either a 5 V or 3.3 V PCI bus
  • Monitor the T1/E1 line conditions such as frame errors, violations, alarms, frequency, power level, and clock (or frame/bit) slips.
  • Routing and Bridging emulation over Multi T1/E1 WAN interfaces using MLPPP (Multi Link PPP) and MFR (Multi Link Frame relay) protocols
  • Support for all  "basic applications" and "special applications"
  • Comprehensive Analysis / Emulation of Voice, Digits, Tones, Fax, Modem, Raw Data, Protocol, Analog, Digital, Echo and Voice Quality testing
  • Provides convenient handset interface for voice over the T1 or E1 line.
  • Remote testing and monitoring can be done using simple script based or GUI based client software.
  • Precision Delay Measurement under basic software measures the Round trip Delay of a system. Round trip delay measurement is done by sending a BER pattern with the insertion of an erred bit and timing the reception of the erred bit. 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.
  • Capable of simulating as well as decoding and demodulating fax calls over T1/E1 lines using Fax Simulator and FaxScan™
  • Windows® and Linux Drivers for Open Source Applications 
  • Compatible with Windows® XP , 7 and 8 operating systems and user friendly real-time software

GL's offers other popular forms of T1 E1 analysis hardware such as

Accompanying Basic & Optional Software

GL’s Universal T1E1 Analyzer software comes with “basic software applications” for basic testing needs and “optional software applications” that extend the capability far beyond the most expensive T1 E1 VF and Serial Data testers. All the basic applications and optional applications supported by legacy HD T1 E1 boards are also supported by Universal HD T1/E1 Boards. For example, capturing and transmitting an entire raw T1 E1 VF or Serial Data signal simultaneously on two full duplex ports, or performing ISDN emulation, or SS7 analysis, or analyzing echo and voice quality on voiceband channels, to name a few.

A list of all the basic applications and other optional applications (requiring additional licenses) are listed here.

Additional applications supported by Universal HD T1/E1 boards are as follows -

Pulse Mask Compliance Testing

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.

For more details, please click here

Jitter Measurement

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.

For more details, please click here

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. In conjunction with GL's Jitter Measurement application, Jitter Generation may also be used to test jitter transfer.

For more details, please click here


Universal T1 E1 Cards supports Normal (no cross-port), Cross-port Through, and Cross-port Transmit loopbacks.

Cross-port Through Loopback

Cross-port Through Loopback

This mode is similar to the standard Outward Loopback except that the signal received on Card 1 (Port 1) is transmitted out onto Card 2 (Port 2). Likewise the signal received on Card 2 (Port 2) is transmitted out onto Card 1 (Port 1). This feature allows monitoring T1/E1 lines in-line while still being protected from loss of power to the board. This mode is effected entirely thru relays and eliminates complex cabling.

Cross-port Transmit Mode Loopback

Cross-port Transmit Mode Loopback

In this Mode, the data that would normally be transmitted on Card 1 (Port 1) is diverted and transmitted on Card 2 (Port 2) and the data that would normally be transmitted on Card 2 (Port 2) is diverted and transmitted on Card 1 (Port 1). The receive paths are completely unaffected. This mode is particularly useful for Drop and Insert and Error Injection applications in which the board analyzes and may insert traffic running between two pieces of T1/E1 equipment. This feature also eliminates complex cabling.


  Physical Interface
T1/E1 Signal Dual RJ48c Connectors
Audio Signal (4) 3.5 mm Unbalanced (or Mono) Audio Jacks (TX & RX)
External Clock (2) MCX Coaxial Jack
PC Interface PCI 2.1 Universal (3.3 V or 5.0 V)

  Environmental specifications
Temperature Operating: 0 to 50° C
Storage: -50 to 70° C
Relative Humidity Operating: 10% to 90% (non-condensing)
Storage: 0% to 95% (non-condensing)
Altitude Operating: -100 to 12,000 ft.
Storage: -100 to 40,000 ft.

  T1/E1 Line Interface
Line Code Format AMI, B8ZS (T1) or HDB3 (E1)
Framing Format Unframed, D4 (T1), ESF (T1), CAS (E1), ESF(J1), FAS (E1), CRC4, (Future Enhancement: SLC96, T1ESF ZBTSI)
Bert Pattern Generation Pseudorandom patterns: (63) 2ˆ6-1, (511) 2ˆ9-1, (2047) 2ˆ11-1, (32767) 2ˆ15-1, (1048575) 2ˆ20-1, (8388607) 2ˆ23-1, QRSS. T1 In-Band Loop Code Generation and Detection, Fixed patterns: All Ones, All Zeros, 1:1, 1:7, 3 in 24. Hardware Compliant: User pattern of up to 32 bits in length International, National & Extra Bits: User Defined (E1)
Display and Logging Bit Errors, Bit Error Rate, Error Seconds, Error Free Seconds, %EFS, Severely Error Seconds, % SES, Degraded Minutes, %Dmin, Loss Pattern Sync Count, Loss of Sync Seconds, Available Seconds, %Available Seconds, Unavailable Seconds, Bipolar Violations, BPV Rate, BPV Seconds, BPV Free Seconds, Frame Errors, FE Rate, FE Seconds, FE Free Seconds, with Detailed logging into disk file.

Resync In Progress, Loss of Signal, Blue Alarm, Change of Frame Alignment, Bipolar Violation, Frame Error, Carrier Loss, Yellow Alarm, Out of Frame Events Counter, Error Super frame Counter, Bipolar Violations, Remote Alarm, Distant Multiframe Alarm, Signaling All Ones, CAS Multiframe Error, CRC4 Error.
Drop and Insert Any Contiguous set of digital timeslots and/or audio input
Facility Data Link T1 ESF Mode: Transmit/Receive Messages, Bit-Oriented Messages, and files.
Loopbacks Normal (Outward and Inward)
Cross-Port Transmit Loopback
Cross-Port Through Loopback

T1/E1 Interface Hardware Compliant:
ANSI: T1.403.1995, T1.231-1993, T1.408
AT&T: TR54016, TR62411
ITU: G.703, G.704, G.706, G.736, G.775, G.823, G.932, I.431, O.151, Q.161
ITU-T: Recommendation I.432-03/93 B-ISDN User-Network Interface-Physical Layer Specification
ETSI: ETS 300 011, ETS 300 166, ETS 300 233, CTR12, CRT4
Japanese: JTG.703, JTI.431, (Future enhancement - JJ-20.11 - CMI Coding Only)
T1 Output Level T1: 3.0V Base to Peak Selectable 0-655Ft Pulse Equalization Setting
E1 Output Level E1: 3.0V ±0.3V Base to Peak
Line Build-Out Selections 0dB, -7.5dB, -15dB, -22.5dB for T1 only
Tx Capability DSX-1 Outputs (to 655 feet)
Alarm Insertion Blue, Yellow, Remote, Distant Multiframe, Bit 7 Zero Suppression
D4 Yellow: 1 in S bit of frame 12
Carrier Loss
Error Insertion BPV, Bit Error, Frame Error, CRC Errors, Burst Frames, Fixed Error Rate, Random Error Rate, auto logic from 10-2 to 10-9 for selectable 56K or 64Kps channels.
Internal Clock Specification Standard: ± 3ppm
Optional: ± 1ppm
Output Clock Source / Synchronization Options Internal, Recovered, External Clock
Frequency offset Universal E1: +/- 615 Hz
Universal T1: +/- 464 Hz

Input Impedance 100 ohms for Terminate and monitor (T1)
120 ohms for Terminate and monitor (E1)
>1K ohms for Bridge
Terminations Terminate, Monitor, Bridge
T1 Input Frequency 1.544MHz ± 20KHz
E1 Input Frequency 2.048Mhz ± 20KHz
Frequency Measurement ± 1ppm
Error Detection Frame Error, CRC Error, CAS Mulitframe Error, BPV Error, Logic Error, Frame Alignment Error
  • 10 or 24 bits for sync time
  • 2/4, 2/5, or 2/6 frame bit in error frame select
  • Frame error bit corruption for 1 or 3 frame bits
  • E-Bit Error
  • Line Code Violation
  • Path Code Violation
Alarm Detection D4 Yellow Alarm, ESF Yellow Alarm
 Hardware Compliant: J1 Yellow Alarm
Input Range T1:
  • 0 to 36dB (Long haul)
  • Monitor
  • Bridge
  • 20dB, 26dB
  • 0 to 43dB (Long haul)
  • Monitor
  • Bridge
  • 20dB, 26dB
Intrinsic Jitter Jitter Tolerance: Meets AT&T TR 62411 (Dec. 90) and ITU-T G.823
Jitter Transfer: Meets AT&T TR 62411 (Dec. 90)

  PCM Interface
Transmit Synthesized Tone: 15 Hz to 3975 Hz selectable in 1Hz steps, +3.0dBm to -40dBm in 0.1 steps selectable, Frequency sweep. Dual Tone: Single or any combination of tones. Supervision: User defined states of A, B, (C, D) bits.
Signaling: DTMF/MF Dialing Digits, ISDN, MFC-R2
File Playback: User created or recorded file.
Special Codes: Milliwatt Codes, CSU Loop Up/Down Codes.
Receive Displays for All Channels: Signaling Bits, Power Level, Frequency, and Data.
Graphical displays: Oscilloscope, Spectral, Spectrogram, Signal-to-Noise
Signaling: DTMF/MF Dialed Digit Detection and Analysis, ISDN, MFC-R2
Recorder: Record Full/Fractional T1/E1/J1 Timeslots to hard disk file.

  VF Audio Interface
  Refer to VF Drop and Insert Capabilities webpage for more details.
Transmit Level: 0.0dBm ± 0.1dBm
Range:  -7.2 dB to +18.2 dB selectable gain in 0.1 dB steps
Output Impedance: 600 Ohms nominal
Receive Audio Monitoring: Built-in Speaker.
Audio Insertion: Selected DS0 replaced with inserted audio from VF Input - Range: 18.0 dB to +7.3 dB selectable gain in 0.1 dB step.
Volume Control: User specified software controller
Input Impedance: 600 ohms nominal
Connectors (4) 3.5 mm Unbalanced (or Mono) Audio Jacks (TX & RX)

  External Clock Interface
Input/Output Level TTL Level tolerant
Input/Output Impedance 50 Ohms nominal

Propagation Delay Simulation Up to 2 Seconds
Precision Delay Measurement Up to 8 Seconds

  Computer Requirement
  Pentium IV or higher with MS-Windows 2000, XP, Vista with PCI expansion slots (3.3V or 5.0V)

  Physical Dimensions
Dimensions 7.1 inches (L) x 4 .2 inches (W)

Specifications subject to change without notice.

Application Notes

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 HUT or HUE depending upon the hardware.

Item No. Item Description
HTE001 Universal HD T1/E1 Cards
HUT001/HUE001 Basic Universal HD T1/E1 Software
  Related Hardware



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Basic Software for E1 (one required) w/ Basic Software for WIN XP / 7
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Basic Laptop E1 Software
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Dual T1 E1 Express Card Basic E1 Software (includes xx600, xx605)
tProbe™ T1 E1 Base Unit
tProbe™ Basic T1 Software
tProbe™ Basic E1 Software
High Stability Internal Clock Option
Refer to T1E1 Buyers Guide List for Complete Details

*Specifications are subjected to change

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