TDM TEst Solutions

T1 E1 Testing

Dual T1E1 Express (PCIe) Analysis & Emulation Boards

GL's Dual T1 E1 Express (PCIe) Boards are high-density dual T1 or E1 boards with newer PCIe (x1) bus interface.  These cards are identical to the portable tProbe™ units, except for FXO FXS and Datacom functionality.

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GL's Dual T1 E1 Express (PCIe) Boards are high-density dual T1 or E1 boards with newer PCIe (x1) bus interface.  These cards are identical to the portable tProbe™ units, except for FXO FXS and Datacom functionality.

In addition to the other basic T1/E1 line signals monitoring applications, the Dual T1 E1 Express (PCIe) Boards also support enhanced VF drop and insert capabilities  with software selectable VF Tx and Rx impedances (135Ω, 150 Ω, 600 Ω, 900 Ω, or High), Pulse Mask Compliance Testing, Jitter Generation and Measurement applications.

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 T1E1 Express (PCIe) Cards)


  • Software Selectable T1 or E1 interfacing along with Drop and Insert
  • PCI Express x1 Lane/Board
  • Monitor the T1/E1 line conditions such as frame errors, violations, alarms, frequency, power level, and clock (or frame/bit) slips
  • TDM, ISDN, SS7 – High Density Voice
  • VoIP, Frame Relay, Multilink Frame Relay, PPP and Multilink PPP, HDLC
  • 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
  • Routing and Bridging emulation over Multi T1/E1 WAN interfaces using MLPPP (Multi Link PPP) and MFR (Multi Link Frame relay) protocols
  • Most all "basic applications" and "special applications" are available for Dual T1 E1 Express boards
  • Comprehensive Analysis / Emulation of Voice, Data, Fax, Protocol, Analog, and Digital signals, including Echo and Voice Quality testing
  • Call Recording, Generation, and Monitoring for hundreds to thousands of calls in one platform
  • Supports T1 E1 Pulse Mask and Jitter Generation and Measurement Analysis
  • "Cross-port Through" and "Cross-port Transmit" Modes – these configurations make cabling with Drop/Insert and Fail-Safe Inline Monitoring very easy
  • Enhanced VF Drop and VF Insert Capabilities using 3.5mm Balanced (Stereo), or Unbalanced (Mono) physical connections
  • The VF Tx and Rx impedance for Dual T1 E1 Express (PCIe) Card analyzer supports software selectable 135, 150, 600, or 900 Ohm terminations
  • Includes individual speakers (one speaker per card)
  • Supports software selectable VF Tx and Rx impedances - 135, 150, 600, or 900 Ohm terminations. Additionally, the VF Rx impedance supports New High Impedance Monitor Termination (>50K Ohms), and external Microphone and Headset (Mic/HS) impedance 
  • VF Tx Gains ranges from -12 dB to +59.5 dB in 0.5 dB steps, and VF Rx Gains ranges from -63.5 dB to +9 dB in 0.5 dB steps
  • Windows and Linux Drivers for Open Source Applications
  • Supports both 32-bit and 64-bit Windows® operating system

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

Comparison with other PCI based GL's T1 E1 Cards

Feature Quad, Octal T1 E1  Boards Dual T1 E1 Express (PCIe) Boards
Number of Ports 4, 8 2
PCI Slot Type PCI Express x1 Bus/ Connector PCI Express x1 Bus / Connector
Speaker (on board) No speakers Supported
Cross-port and Through Modes Supported Supported
Pulse Mask Application Not Supported Supported
Jitter Generation and Measurement Not Supported Supported
External Clock Mode No clock port connector Supported
Clock Offset Capability All ports at the same time 1 Port at a time
VF Interface and Impedance Not Supported Supported; 135/150/600/900/High
VF Interface for Mic/Headset Not Supported Supported
Drop and Insert  (VF and T1/E1) No VF connectors; Digital Drop/Insert supported Supported
Onboard RAM Not Supported Supported


Physical Interface  


Dual RJ48c Connectors

Audio Signal

(4) 3.5 mm Balanced (Stereo) or Unbalanced (or Mono) Audio Jacks (TX & RX)

PC Interface

PCI Express x1 Lane
Compliant to PCI Express Base Specification v1.1

External clock

(1) MCX Coaxial Jack

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  

Framing Formats

Unframed, D4 (T1) , ESF(T1), ESF(J1), CAS(E1), FAS(E1), CRC4
Hardware Compliant: SLC96, T1ESF ZBTSI

Line Code format

AMI, B8ZS (T1) or HDB3 (E1)

Internal Clock Specification

Standard: +/- 3ppm Optional: +/- 1ppm

Output Clock Source

Internal (+/- 1 ppm or 3 ppm), Recovered, External Clock

T1 Output Level

T1: 3.0V Base to Peak Selectable 0-655Ft Pulse Equalization Setting; Tx Capability - DSX-1 Outputs (to 655 feet)

E1 Output Level

E1: 3.0V ± 0.3V Base to Peak

Input Level

75 mV to 6V base to peak or -30 dBsx to -6 dBsx

Line Build-Out Selections

0dB, -7.5dB, -15dB, -22.5dB for T1 only


Normal (Outward and Inward)
Cross-Port Transmit Loopback
Cross-Port Through Loopback

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.
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, & 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 Timeslots to hard disk file.


T1/E1 Interface Hardware Compliance

  • 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 Spec

  • ETSI: ETS 300 011, ETS 300 166, ETS 300 233, CTR12, CRT4

  • Japanese: JTG.703, JTI.431, JJ-20.11 (CMI Coding Only)

Bert Pattern Generation

Pseudorandom patterns: (63) 2^6-1, (511) 2^9-1, (2047) 2^11-1, (32767) 2^15-1, (1048575) 2^20-1, (8388607) 2^23-1, QRSS.
Hardware Compliant: T1 In-Band Loop Code Generation and Detection
Fixed patterns: All Ones, All Zeros, 1:1, 1:7, 3 in 24, User Defined 24- Bits
Hardware Compliant: User pattern of up to 32 bits in length
International, National & Extra Bits: User Defined (E1)

Alarm Insertion

Blue, Yellow, Remote, Distant Multiframe, Bit 7 Zero Suppression
D4 Yellow: 1 in S bit of frame 12
Receive Carrier Loss: 0's for 2047 or 255 bits (For E1 only)

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.

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.

Zero Suppression

B7 Stuffing, Transparent, & B8ZS (T1)


Robbed-Bit or Clear Channel

Frequency Offset

E1: +/- 615Hz


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, BPV Error, Logic Error, Frame Alignment Error
Hardware Compliant:
* 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

Alarm Detection

T1 - D4 Yellow Alarm, ESF Yellow Alarm
Yellow Alarm (B2 Suppressed-2nd MSB)
Yellow Alarm (S-Bit)
Yellow Alarm (00FF in FDL)
Blue Alarm (Framed or Unframed All Ones)
E1 - Remote Alarm
Distant MultiFrame Alarm
Signaling All Ones
Unframed All Ones
Hardware Compliant: J1 Yellow Alarm

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)

Input Range

Terminate: 0 to 36dB (Long Haul), 0 to 15dB (Limited Long Haul),
DSX Monitor: 20dB, 26dB, 32dB
Bridge E1: Terminate, 0 to 43dB (Long Haul), 0 to 13dB (Short Haul),
DSX Monitor: 20dB, 26dB, 32dB

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.

VF Audio, Drop and Insert  


Signal Level Measurement Accuracy: 0.0dBm +/- 0.1dBm
Range: -7.2 dB to +18.2 dB selectable gain in 0.1 dB steps
Output Impedance: 135, 150, 600, 900 Ohms


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: Software selectable 135, 150, 600, 900 Ohms for Intrusive Testing. High Impedance (>50K Ohms) for Non-Intrusive Testing
Provision for external Microphone (Mic/HS) on VF ports connection

Sampling Rates

8 KHz, 16 kHz

Datawidth (bits)

Supports 8, 16, 20, 24, 32 Bit Data

VF Tx Gains

Supports -12 dB to +59 dB in 0.5dB Steps Gain (0.1 dB steps can also be accommodated)

VF Rx Gains

Supports -63.5 dB to +9 dB in 0.5dB Steps Attenuation (0.1 dB steps can also be accommodated)


(4) 3.5 mm Balanced (Stereo) or Unbalanced (Mono) Audio Jacks (TX & RX)

Computer Requirement  


Pentium IV or higher with MS-Windows® XP,  7 or 8 with PCIe expansion slots (3.3V or 5.0V)

Physical Dimensions  


6.7 inches x 4.4 inches

* Specifications subject to change without notice.


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), XUT or XUE (Dual PCIe Express) depending upon the hardware.

Item Description
Dual T1 E1 Express (PCIe) Boards (requires additional licenses)
XUT001 Dual T1 E1 Express Card Basic T1 Software (includes xx600, xx605)
XUE001 Dual T1 E1 Express Card Basic E1 Software (includes xx600, xx605)
Optional Software
XX010 Application Development Tool Kit
(Programmer's Guide)
XX018 Multi-Channel BERT Software
XX019 Transmit/Receive File Utility Software
XX020 Record and Playback of Files
XX051 Synchronous Trunk Record Playback
XX021 FDL Software for ESF (T1 only)
XX022 DTMF/MF Detector & Generator Software
XX023 T1 A-law or E1 µ-law Software
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
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/SS4 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 Canceller Testing Software Options
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
PKV170 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