TDM TEst Solutions

T1 E1 Testing

Dual HD Universal T1 E1 Card - (PCI)

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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.

Increased Performance with 64-bit Support

GL’s T1/E1 analyzers supports both 32-bit and 64-bit applications. 64-bit support improves the performance of Protocol Analysers viz., ISDN, ISUP, GSM and allow users to monitor Hundreds to Thousands of Signaling Links simultaneously and continuously. Also, provides improved processing and response time for Statistics, Call Data Records, Search and other such functions.

Enhanced CCA application allows better processing and response time for multiple instances of CCA applications for long run tests. Similarly, all basic Intrusive and Non Intrusive applications such as BERT, Monitoring Applications, Oscilloscope, Spectral Display etc provide better processing and response time for multiple instances of monitoring and simulations windows.

MAPS™ Protocol Emulators are enhanced to provide improved performance for load generation and simulation of Protocols on 16 T1/E1 ports simultaneously.

Client Server commands support Thousands of Tasks simultaneously with number of successful thread creation. This helps to run Tx Rx File, Tx and Rx Tone and Tx Rx Digits on 24/31 Timeslots * 8 Ports * n (where n is the number of Dual HD Universal T1 E1 Cards)


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"
  • Physical layer analysis includes ability to send alarms and errors via SNMP Traps
  • All protocol analyzers now include frame length in protocol statistics selection choice for data link layer
  • 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 
  • Supports both 32-bit and 64-bit Windows® operating system.

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


  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


Operating: 0 to 50° C
Storage: -50 to 70° C

Relative Humidity

Operating: 10% to 90% (non-condensing)
Storage: 0% to 95% (non-condensing)


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.


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


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


  • 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


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.


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.


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


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


(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

  Physical Dimensions


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

Specifications subject to change without notice. Specifications

Physical Interface  

T1/E1 Signal

RJ48c Connectors Four (4) or Eight (8) per board

PC Interface

PCI Express X1 Lane
Compliant to PCI Express Base Specification v1.1

* Specifications subject to change without notice.


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.

Basic Applications
Optional Applications


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.