TDM TEst Solutions

T1 E1 Testing

tScan16™ - T1/E1 Analysis Hardware
(16 T1/E1 Rx Only Ports)

GL's tScan16™ is a high-density T1/E1 board with 16 ports and the newer PCIe (x1) bus interface. The sixteen T1/E1 ports are Receive-only ports optimized for high performance voice and data capture, monitoring, and analysis requirements.

Octal/Quad T1 E1 PCI Board


GL's tScan16™ is a high-density T1/E1 board  with 16 ports and the newer PCIe (x1) bus interface. The sixteen T1/E1 ports are Receive-only ports optimized for high performance voice and  data  capture, monitoring, and analysis  requirements.  tScan16™ extends the family of GL’s T1/E1 platforms  with greater density, increased ports, and reduced power.

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 Signalling 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.


  • Software selectable 16 Rx Only T1 or E1 interfaces
  • PCI Express x1 Lane/Board
  • Convenient High Density Cabling
  • Monitor T1/E1 line conditions such as frame errors, bipolar violations, alarms, frequency, power level, and clock (or frame/bit) slips.
  • Comprehensive analysis of ISDN, SS7, Frame Relay, Multilink Frame Relay, PPP and Multilink PPP, HDLC, and many more protocols
  • All protocol analyzers now include frame length in protocol statistics selection choice for data link layer
  • Comprehensive analysis of Voice, Data, Fax, Protocols, and Digital signals, including Echo and Voice Quality testing
  • Call Recording, Analysis, and Monitoring for hundreds to thousands of calls in one platform
  • Most all “Rx Applications” are available with tScan16™.
  • Supports both 32-bit and 64-bit Windows® operating system.

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

Comparison and advantages of the new tScan16™ over Quad/Octal T1/E1 Boards is given in the following table.

Quad, Octal T1/E1 Boards tScan16™ T1/E1 Boards

Number of Ports

4, 8

16 (Rx only)
31x16 = 496 timeslots for E1
24x16 = 384 timeslots for T1

Board Height:

Standard PCIe board

Standard PCIe board or 2U

PC Bus:

PCIe v1.1 x1

PCIe v1.1 x1

Adapter Board:

Quad: none; Octal: 4 port daughterboard

16 port RJ45 breakout board with MDR 36-Pin Connector (3M Mini D Ribbon cable) to interface with main board

T1/E1 Connectors:


RJ-45 with Inline Monitoring T1/E1

T1/E1 Termination modes:

Terminate, Bridge, Monitor

Terminate and Monitor 
(on main board)

T1/E1 interface modes:

Normal Mode, Cross-port Through Mode

Receive Only into main board. Breakout adaptor board connects equipment side and line side using RJ45 connector.


Physical Interface



(16) Dual RJ45c Jacks on the Breakout Board


MDR 36-Pin Connector (3M Mini D Ribbon cable) to interface Breakout Board with Main Board
See image 3M (MDR) 36-Pin Connector

PC Interface

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

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)

Altitude Operating: -100 to 12,000 ft.
Storage: -100 to 40,000 ft.

Internal Clock Specification

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

PCM Interface



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.

 Specification Compliance


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

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)


Terminate and Monitor

T1 Input Frequency

1.544MHz +/- 20KHz

E1 Input Frequency

2.048Mhz +/- 20KHz

Frequency Measurement

+/- 1ppm

Error Detection

Frame Error, CRC Error, CAS Multiframe Error, BPV 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

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

Input Range

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

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.

Computer Requirement



Core i3 or higher with MS-Windows®  7 or 8 with PCIe expansion slots (3.3V or 5.0V)

Physical Dimensions



6.60’’ long, 2.71’’ high (2U high) –from the top to the bottom of the PCIe tab, the lowest point on the board

tScan16 Full Height bracket (for normal standalone PCs): 4.725’’ high

tScan16 Half Height bracket (for 2U rack PCs): 3.118’’ high

tScan16 Breakout Box: 7.29’’ wide, 1.52’’ high, 2.5’’ deep

Use of tScan16™ Breakout Box in Monitor Mode

tScan™ with DSX1 Patch Panel

tScan™ with DSX1 Patch Panel

tScan™ without DSX1 Patch Panel

tScan™ without DSX1 Patch Panel

For more details on the usage of Breakout Box, please download tScan16™ Breakout Box Reference Guide

Supported Rx Applications

tScan16™ supports almost all Rx Applications (monitoring applications) available with GL’s regular T1/E1 analyzers.

Basic Applications

  • Byte Values & Binary Byte Values
  • Signaling bits, Power Level, DC Offset, & Frequency
  • Multi-frames, and Real-time Multi-frames
  • T1/E1 Data as Real-time Bitmap
  • Timeslot Window
  • ASCII Timeslot Display
  • Oscilloscope & Power Spectral
  • Audio Monitoring & Active Voice Level
  • BERT
  • Windows Client / Server
  • Manual, Automated Record Files

Optional Applications

  • Protocol Analysis: ISDN, HDLC, SS7, GSM, GPRS, UMTS, Frame Relay, ATM, PPP, TRAU, T1 Facility Data Link , E1 Maintenance Data Link (Sa HDLC, and SSM), and more
  • WCS Modules: Rx files, digits, Multi-channel BERT, DSP operations, Dynamic DSP capability
  • Capture & Analysis : DTMF / MF / MFCR2, Digits, Tones, Voice, Modem, Raw Data
  • Call Data Records
  • Voice Band Analysis Software
  • Multi-Channel BERT
  • Protocol Identifier
  • Signaling Transitions Recording
  • Real-time Strip Chart
  • Real-time Multichannel Audio Bridge
  • Multiplex / Demultiplex Software
  • Network Surveillance, Voice Quality Testing
  • Echo and Delay Measurements


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.