T1 E1 Testing

PCI Based Ultra T1/E1 Cards



The ULTRA T1 (E1) is an enhanced third-generation product that consolidates the essential pieces of industry-standard test equipment into a powerful, PC-Based T1 and E1 solution. Utilizing familiar computer user interfaces, it provides comprehensive and versatile T1 or E1 testing capability at a competitive price.

The ULTRA T1 (E1) Card transforms your PC into a sophisticated T1 or E1 analyzer. Prior versions of the Ultra T1(E1) Cards were designed for use in ISA slots, and the current Ultra T1(E1) cards are PCI. The newer PCI versions are available with either a single T1(or E1) interface or with a dual T1(or E1) interfaces.

The ULTRA T1 (E1) features in-service monitoring of T1 (E1) circuit connections, including 64-Kbps channels within a T1 or E1. It provides out-of-service troubleshooting such as bit-error-rate testing. Drop and Insert capabilities provide access to DS0s without disrupting service.

The ULTRA T1 (E1) can be used for routine testing of errors, such as bit errors, frame errors, and bipolar violation; signals, including received frequency, received signal level, and data bits; and timing including signal-loss seconds, test length etc. Alarm monitoring and time-stamped logging provide windows into the network performance.

The ULTRA T1 (E1) emulates and decodes all 24 (32) channels simultaneously for Signaling Bits, Power Level, Frequency and Multi-Frame Data. DTMF/MF generation and detection, signaling bit manipulation and recording provide complete signaling capabilities.

Graphical views simplify the understanding of PCM data. Time-domain is presented using an oscilloscope display, and frequency domain using spectral displays.

Voice Frequency Access: Besides providing access to in-band PCM data, the ULTRA T1 (E1) provides VF interface for monitoring and inserting audio with Drop and Insert. The unit also provides convenient handset interface for voice over the T1 or E1 line.

Remote testing and monitoring can be done by remote accessing the PC using familiar 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.

New Generation High Density T1 and E1 Boards


The new generation T1 and E1 boards can process hundreds of channels or timeslots simultaneously on T1 and E1 lines. These boards are smaller, more efficient, and significantly faster as compared to older PCI boards.

Comparison and advantages of the new generation High Density T1/E1 cards with the older Dual PCI T1/E1 cards are given in the following table.

Feature High Density Dual T1/E1 cards(New generation cards) Dual PCI T1/E1Cards (old cards)
Size (form factor) Smaller (more than two inches shorter)

Benefit: Fits inside smaller form factor PCs
Speed Significantly Faster - uses 32 bit wide bus, and is built on Direct Memory Access (DMA) technology

Benefit: DMA technology prevents conflicts with existing devices
Uses only 16-bit wide bus and uses older interrupt driven technology
PC CPU Utilization Very CPU efficient. Compatible with Hyperthreading and Dual Processor architectures

Benefit: The on-board processing and the DMA technology make this board very CPU efficient. This will allow the user to put up to 12 boards per system supporting 24 independent T1/E1 ports
CPU requirements impose a limit of 4 boards per system

Not compatible with Dual Processors or Hyperthreading
Highly improved on-board logic The new on-board chips are faster, and have larger memories. These chips can store the entire logic for supporting various applications. Hence loading different logic to support different applications are no longer necessary

Benefit: Gives the user the ability to run special applications simultaneously and without "T1 E1 line interference" associated with unloading and loading of multiple loads. Newer applications that exploit the above features are available (as well as current applications are being enhanced), see below for more details
Cannot run multiple applications that require separate loads simultaneously

Detailed Description of Advantages

General Description

The new generation boards have item numbers HDT001 and HDE001 for "High Density Dual T1" and "High Density Dual E1". These replace the older DPT001 and DPE001 boards. They can be distinguished from the DP-series boards by the letters "HD" appearing on the card bracket immediately below the T1 or E1 designator (Earliest productions of this board were distinguished by red "E1" or "T1" lettering.) The serial numbers follow the scheme below:

  • HDT001s - 766xxx older DPT001s - 755xxx
  • HDE001s - 866xxx older DPE001s - 855xxx

Smaller Size

GL's new "high density boards" are smaller, with dimensions 4.2" x 7.1" vs. the older boards 4.2" x 9.2".

High Density and High Speed

The HD boards are significantly faster, and significantly more efficient than the older boards. The new boards use DMA and a 32-bit wide bus; the older boards used an interrupt driven scheme and a 16-bit bus; the older boards sometimes conflicted with interrupts shared by other devices.

CPU Usage

CPU utilization with the newer boards is negligible with increasing boards in a system. With the older boards, there was a practical limit of 4 dual boards to a system - with limitations in overall capability as well. One can easily put 12 new dual boards in one rack system running many applications on all 24 ports simultaneously. For example, one can simulate echo on hundreds of timeslots by running simultaneously "delay/attenuate" on all 24 T1 ports on all timeslots.

Unlike older boards, HD Boards are compatible with dual processor motherboards and software that simulates dual processors (i.e. hyperthreading).

Improved On-board Logic

  • The newer boards use an upgraded FPGA to handle almost all specialized functions with a "single load" vs. multiple loads on older cards. This permits special applications to be run simultaneously and without "T1 E1 line interference" associated with unloading and loading of multiple loads. For example FDL applications can be run simultaneously with BERT or Error Insertion applications.
  • There are significant BERT enhancements incorporated into the FPGA hardware. These are sub-channel BERT, non-contiguous timeslot BERT, user defined programmable patterns, independent transmit and receive BERT sections, and inverting patterns. Bit error rate insertion has also been incorporated into the FPGA. User software to take advantage of these capabilities will soon be developed. Xilinx loads "t1pass.bit" and "e1pass.bit" are modified to improve multichannel BERT performance.
  • The FPGA will also handle "signaling bits", called CAS (Channel Associated Signaling). The older cards implemented this through software. User software to take advantage of this capability will soon be developed.
  • An application has been developed for the high density boards that make special use of the large FPGA on these boards. This application simulates "single channel low echo path delays" and is a complement to the software version the "delay/attenuate" software. While the older software implementation imposes an internal delay of 20ms, the newer hardware implementation shortens the internal delay to as low as about 1 ms.
  • Another special application that allows handling of "A-law all bits inverted" on T1 lines is included. In general any code conversion such as inversion can be performed in the FPGA of the high density boards.
  • Application FPGA registers are built into the application Xilinx (a control block for most operation conducted by the board) and help in controlling various settings on the board that affect he logic operations applied to the T1/E1 stream. Applications manipulate these registers when certain settings are applied by the user. End users are not expected to know the detail specifications of these registers. This feature includes registers useful during remote debugging.
  • Application Xilinx also includes XOR capability for voice band client.

Currently high density boards are only available in dual t1 or dual e1 port versions. Single port versions are not available.

Accompanying Basic & Optional Software

All the basic applications and optional applications supported by legacy HD T1 E1 boards are also supported by USB based T1/E1 Units. A list of all the basic applications and other optional applications (requiring additional licenses).


Physical Interface

T1/E1 Signal RJ48c Connectors or Tx and Rx Bantam Jacks
Audio Signal Tx and Rx Mini Headphone Jacks (1/8 inch - diameter) or Bantam Jacks (600 ohms)
External Clock MCX or SMB Coaxial Jack
PC Interface ISA-AT-Style/PCI 2.1 Compliant for Cards
Parallel Port /PCMCIA Type II for Laptop Units.

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 or B8ZS(T1), HDB3(E1)
Framing Format D4, ESF, Unframed, CAS, CCS, CRC4
Input Frequency 1.544 Mbps (T1) or 2.048 Mbps (E1)
Input Impedance For Terminate and Monitor = 100 Ohms (T1), 120 Ohms (E1), For Bridge > 1000 Ohms
Input Level 75 mV to 6V base to peak or -30 dBsx to -6 dBsx
Output Level 3.0V ± 0.3 Base to Peak, Selectable 0-655 ft. Pulse Equalization Setting (T1 Short Haul)
or line build-outs for 0 dB to -22.5 dB (T1 Long Haul)
Receiver Interface Terminate, Monitor, and Bridge
Output Clock Source Recovered, Internal (± 1 ppm or 3 ppm), or External
Power T1
0.6 mAmp @ -5V min; 12.0 mAmp @ -5V max
0.76 mAmp @ +5V min; 13.5 mAmp @ +5V max

0.6 mAmp @ -5V min; 12.0 mAmp @ -5V max
0.76 mAmp @ +5V min; 13.5 mAmp @ +5V max
Zero Suppression B7 Stuffing, Transparent, & B8ZS (T1)
Signaling Robbed-Bit or Clear Channel (Single and Dual PCI)
Alarm Detection and Generation T1
Yellow Alarm (B2 Suppressed-2nd MSB)
Yellow Alarm (S-Bit)
Yellow Alarm (00FF in FDL)
Blue Alarm (Framed or Unframed All Ones)

Remote Alarm
Distant Multi frame Alarm
Signaling All Ones
Unframed All Ones


T1/E1 Interface Hardware Compliant:
ANSI: T1.102, T1.403, T1.408
ITU: I.431, G.703, G.736, G.775, G.823
ETSI: ETS 300 166, ETS 300 233
AT&T 62411

PCM Channel Simulation Sources

Synthesized Tone 15 Hz to 3975 Hz selectable in 1 Hz steps, +3.0 dBm to -40.0 dBm 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
Error Insertion Bipolar Violation, Blue Alarms, Yellow Alarms, Frame Error, CRC Errors, Bit Errors, Burst Frames, Fixed Error Rate, Random Error Rate, Remote Alarm, Distant Multiframe Alarm

PCM Channel Receiver

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
Recorder Record Full/Fractional T1/E1 Timeslots to Hard Disk File
Receiver Out-Of-Frame Criteria T1
2 of 4 Framing Bits
2 of 5 Framing Bits
Receiver Resync Options T1
10 Consecutive Ft or FPS bits
24 Consecutive Ft or FPS bits
Re sync Using only Ft or FPS bits
Re sync Using Both Ft and Fs or FPS and CRC
CAS Multi frame Sync Criteria E1
Fixed Re sync Criteria
Fixed and/or 0000XXXX in Two Consecutive Timeslot 16s
Frame Re sync Criteria
Fixed and/or Bit 2 in Timeslot 0 of Nonaligned Frames in Error on 3 Consecutive Occasions

Facility Data Link

T1 ESF Mode Transmit/ Receive Messages, Bit-Oriented Messages, and Files

Drop and Insert

Digital/Analog Any Contiguous set of digital Timeslots and/or Audio Input

Pattern Generation

BERT 63(26-1), 511(29-1), 2047(211-1), 32767(215-1), 1048575(220-1), 8388607(223-1), QRSS, All Ones, All Zeros, 1:1, 1:7, 3-IN-24, User Defined 24- Bits, Auto Logic & BPV error insertion from 10-2 - 10-9 for selectable 56/64 Kbps channels
International, National & Extra Bits User Defined (E1)

Result Display and Logging

BERT 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
Alarms 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, Errored Superframe Counter, Bipolar Violations Counter, Remote Alarm, Distant Multiframe Alarm, Signaling All Ones, CAS Multiframe Error, CRC4 Error

Audio Channel Access

VF Input/Output Impedance 600 Ohms
Audio Monitoring Built-in-Speaker or External Speaker Attachment
Volume Control User Specified Software Controller
Audio Insertion Selected DS0 replaced with inserted audio from VF Input or Handset with selected gain

Propagation Delay

Measurement Up to 2 Seconds

Precision Delay

Measurement Up to 8 Seconds

Computer Requirement

Pentium or better with 100M bytes of free space available on hard disk, Win 95/98/NT, 32M byte RAM, 1.44M(3.5 inch) drive, AT-Style ISA expansion slots or PCI expansion slots.

Physical Dimensions

Dimensions  7.0 L x 4.2 H (Single ISA and PCI card)
 9.2 L x 4.2 H (Dual PCI card)
 7.1 L x 4.2 H (Dual HD card)
 8.2 L x 5.8 H x 1.8 H (Laptop Analyzers)

Specifications subject to change without notice.

Application Notes


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
HDT001/HDE001 Dual PCI Ultra HD T1/E1 Card with Basic Analyzer Software
  Related Hardware

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 (zero dollar, but required with appropriate licenses)
Basic Software for E1 (zero dollar, but required with appropriate licenses)
tProbe™ T1 E1 Base Unit
tProbe™ Basic T1 Software
tProbe™ Basic E1 Software
High Stability Internal Clock Option
Dual Laptop T1/E1 Hardware USB Base Unit
Basic Laptop T1 Software
Basic Laptop E1 Software
High Stability Internal Clock Option
HD Universal Dual T1/E1 Card
HD Universal Card Basic T1 Software
HD Universal Card Basic E1 Software
High Stability Internal Clock Option
Refer to T1E1 Buyers Guide List for Complete Details