EST-120/EST-125
E1 Service Tester
Applications
Functions
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Installing, commissioning and maintaining E1 circuits
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E1 and n x 64kbit/s BERT with Autoconfigure
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Installing, commissioning and maintaining E1 cross-connects and E1/ G.703 co-directional multiplexers
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Clear OK/Status Page
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Gelbrich Synchronization
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G.821, G.826 and M.2100 testing
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G.703 co-directional interface
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E1 signal jitter, level, and pulse shape measurement
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Remote Operation
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Installing and maintaining GSM circuits
This powerful tester includes a full set of measurements to install, commission and troubleshoot E1 circuits. Installation tests require basic out-of-service Bit Error Rate (BER) testing to assess cabling integrity. Full commissioning requires extended BER testing to international standards, as well as stress testing and complete assessment of link performance with respect to error and alarm reporting. For successful maintenance, rapid identification of the current line status is critical to the speedy resolution of problems. Specific services (such as GSM) have their own testing requirements, and require a tailored solution to ensure satisfactory operation.
Features such as Autoconfigure and the 'Big OK' result screen make it easy to use with a minimum of training. Quality of Service can be measured with G.821, G.826 or M.2100. Multiplexer tests include MUX/DEMUX and A-D/D-A. Other important features include round trip delay measurement and E1 drop and insert. A comprehensive range of printouts and autoprints can be produced. Histograms with one minute resolution are important for troubleshooting. The DTM-32 family provides a specific driver for simple remote operation. Multiple languages are supported, English, French, German, Spanish, Italian, Portuguese and Turkish.
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Minimum training for installation and commissioning teams
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Robust and reliable, low life-cycle cost
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All the tests needed for advanced troubleshooting
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Service applications includes GSM commissioning
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Upgradable
Easy to Use
Battery/Mains Operation
The EST-120/125 have been designed with the user in mind. As well as being lightweight and comfortable to hold and carry, all testers feature large LCD screens with integral backlight for the most demanding testing environments. If you wish to selfsupport the tester, the integral two-position backstand/carry handle can easily be folded out, and can also be configured to suspend the instrument for hands-free viewing.
8-10 hour battery life using rechargeable and exchangeable batteries. Long duration testing can be achieved with a.c. mains power.
Test results are displayed in a concise, graphical format with our recognised 'Big OK' when no errors are present. Multiple language support is standard and comprehensive alarm and error status LEDs give clear indication of problems, even from a distance. And, as you'd expect, all results data can be stored for later analysis or output with a single keypress from the ergonomic keypad.
Software Option Download The testing capability of the EST-120/125 can be greatly extended by downloading of a range of software options. Applicable options include Signal Level Measurement, Pulse Shape Analysis, Jitter, Large Frequency Offset of Transmit Clock, HCM, GSM, and Voice Channel Noise Measurement.
Upgradable for Datacoms Testing The upgrade option enables you to upgrade at any time in the future to a EDT-135. This adds datacom circuit, multiplexer, V.24 modem and Frame Relay test capability.
Autoconfigure The Autoconfigure feature greatly simplifies instrument set-up. A test can be started on framed or unframed traffic using just 2 key-presses. For a framed signal, the instrument can determine the framing type, timeslot allocation and test pattern type.
Gelbrich Synchronization The patented Gelbrich Synchronization method enables synchronization on a test pattern to be maintained and accurate BER measurement to be made even in the presence of rapid bursts of errors. It also enables differentiation to be made between bit slips and bit errors.
Instrument Applications EST-120/EST-125 E1 Service Turn-up Availability and performance of an E1 link can be established using either an intrusive or a non-intrusive test. The EST-120/125 can be connected via 75W or 120W connectors using Hi-Z termination or at a protected monitor point. A simple E1 test will take no longer than 30 seconds, the OK screen quickly indicates when an E1 service is present and errorfree. G.826/M.2100 test sequences can then be run, and the results displayed, stored and printed.
Result Storage and Printing The EST-120/125 each have 8 test memories for the storage of text and histogram results, for viewing or printing at a later time. Printing of results is supported through the serial port. A set-up screen enables the instrument to be set up for a range of printers.
Programmable Timers The instrument can be programmed to start a test at a specified date and time for a selectable duration.
Remote Operation The instrument is compatible with the DTM-32 remote operation solution.
Timeslot Analysis and Traffic Analysis Access to the timeslots in the E1 frame enables the following tests: -
Voice decode of individual timeslots to establish that the service is running
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Level and frequency measurements in a selected timeslot to ensure that the multiplexer is operating correctly
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Drop/Insert to a protocol analyzer for service analysis
histograms for each valid alarm, error and G.826/M.2100 result type (up to 12) at each resolution (days, hours, minutes and seconds).
E1 Service Troubleshooting An extended bit error test will determine whether a periodic fault is causing problems. Electrical equipment such as air-conditioning may cause problems at regular times in the day. Bit errors can be indicated as a histogram on a scale of up to 60 days.
G.826 and M.2100 Analysis G.826 is the ITU-T recommendation for error performance of international digital paths at or above the Primary Rate. The complementary M.21xx series permits rigorous testing of PDH links but in shorter time periods. Both methods are included as standard software modules in the EST testers. The following screens illustrate the summary results from G.826 and M.2100 tests.
Results Monitor
Such displays make it possible to identify external events which can be isolated as causes of the problem. Jitter measurements can be made to determine whether jitter is the cause of excessive bit errors.
A graphical display of past and present alarm occurrences and error ratios for both near and far directions at the same time.
Histograms Faults in an E1 line can be caused by low signal, pulse distortion or jitter. If loss of signal (LOS) or similar alarms are indicated by a network element, level measurement and pulse shape tests can easily be made to determine where the fault exists in a link, by examining the signal condition. A low or distorted signal received by a network element would indicate a problem with the preceding element or the interconnecting cables. A set of histogram screens is displayed, based on the recorded history of alarms, errors and G.826/M.2100 events. There are
Excessive jitter can result in bit errors, loss of frame synchronization or similar faults. Where these faults exist, jitter measurements can be performed to determine if jitter is the cause, and also to discover at which point in the system the jitter reaches unacceptable levels.
GSM A and Abis Testing (Software Option) A and Abis 2Mbit/s interfaces within GSM networks can be brought into service and monitored. Bit Error measurements can be performed on the TRAU FAS or on unframed data within a 16kbit/s channel. The Channel Status page shows the contents and status of each channel.
If high jitter levels are isolated to the outputs of particular network elements, these elements can be taken out of service and further tested by injecting jitter at a known level and testing the jitter on the output (jitter transfer). Jitter testing, Level Measurement and Pulse Shape Analysis options can be ordered for the EST-120/125.
EST-125 only E1 Delay Measurement Delay in E1 links can be induced by satellite links. Excessive delay can impair voice calls and reduce the bandwidth of data networks as a result of message retransmission. The EST-125 measures round trip delay to an accuracy of ±1ms up to a total of 10 seconds.
ELM-2 Equalizer and Level Meter The ELM-2 accessory allows the instrument to be connected to 2Mbit/s lines carrying hazardous voltages and Ö¦ distortion. It removes the DC voltage, equalizes the signal and also measures and displays the signal level.
PenBERT PCM monitor The PenBERT PCM monitor can be used with the EST-120/125 to perform simple end-to-end tests of a 2Mbit/s line. Errors and alarms are indicated by LEDs.
Equipment Cases N x 64 timeslots analysis
A range of equipment cases and shoulder-bags are available to allow convenient transport and storage of the EST-120/EST-125 and accessories.
64kbit/s timeslots are grouped within the E1 frame to give endcustomers intermediate data speeds such as 128 or 256kbit/s. The EST-125 can perform BER analysis on bundles of n x 64kbit/s slots, and drop and insert n x 64kbit/s to an external protocol analyzer via V.11.
DTM-32 Features The DTM-32 product offers Remote Operation using an onscreen faceplate, via an easy to use WindowsTM interface.
Weight/Dimensions Weight: 1.55 kg approx Dimensions (in mm):
Technical Specifications Generator/Receiver
Level and Frequency
Self Check
Interfaces: G.703 Outputs: Balanced 3 pin CF connector Unbalanced BNC connector
Digital generation/measurement of sinusoidal signals in a timeslot. (A-law coding to ITU-T Rec. G.711)
Comprehensive self check at power on
G.703 Test Modes: RX Framing: PCM30, PCM30CRC, PCM31, PCM31CRC, or Unframed G.703 line code: HDB3, AMI, co-directional V.11 drop: 1 x 64kbit/s, n x 64kbit/s (EST-125 only)
RX/TX As RX plus: Test pattern generation: Unframed Single timeslot n x 64kbit/s timeslots V.11 Drop or Insert: Drop n x 64kbit/s timeslots EST-125 only: V.11 Drop/Insert: Drop n x 64kbit/s timeslots Insert n x 64kbit/s timeslots Drop and Insert 1 timeslot Programmable Si, Sa, A and E bits and NMFAS
Test Patterns PRBS: 26-1, 29-1, 211-1, 215-1, Alternating 1s and 0s, All 1s, All 0s, 8 and 16 bit programmable word
Error Injection Bit, Code, FAS, CRC errors: Single, ratio or frequency (frequency EST-125 only)
Clocking G.703 transmit clock source 2048kbit/s and co-directional: Internal, External, From RX
Error and Alarm Indication LEDs: 2 summary, 14 alarm/error, option, low battery
Printer and Remote Operation Interface: V.24, DTE, Async Baud rates: 300, 600, 1200, 2400, 9600, 19200, 38400
Through Mode (Framed 2Mbit/s only)
Front Panel
As RX/TX plus Drop and/or Insert n x 64kbit/s timeslots via V.11 (EST-125 only)
Round Trip Delay (EST-125 only) Framed and Unframed 2Mbit/s
Display: 42 character x 16 line LCD, LED backlight Keyboard: Numerical keypad, 4 Cursor, 2 Contrast, Main Menu, 6 Softkeys, Security, On and Off
Framed Monitor
Stores/Memory
Monitor and display of: FAS, NFAS, MFAS, NMFAS, and CRC MFAS words, 8-bit digital code word in any selected timeslot, CAS status of all 30 channels with idle/busy indication
8 test result memories and 8 configuration stores
Languages English, German, French, Spanish, Italian, Turkish and Portuguese
Power Supply External supply: External mains charger Rechargeable batteries: 8 to 10 hours operating time Battery low: warning before auto switch off
Ordering Information The following packages are available : EST Silver (includes M.2100, G.826, Extended PRBS, Level Measurement Options) EST Gold (M.2100, G.826, Extended PRBS, Pulse Shape, Level Measurement and Jitter Options) Complete with: a.c. adapter/charger, select appropriate plug: US, Euro, UK or Australian Operating Manual M.2100 Option G.826 Option Extended PRBS Option
BN 4562/21
BN 4562/26
BN 4562/00.13 BN 4562/00.34 BN 4562/00.36
Accessories (available at extra cost): External clock adapter Download cable Printer cable Equipment case (small) Equipment case (large) Soft carrying case Soft shoulder bag Neck strap ELM-2 Equalizer Level Meter PenBERT 2Mbit/s Monitor
K 1513 K 1515 K 1500 BN 4523/00.50 BN 4562/00.51 BN 4518/00.08 BN 4562/00.01 BN 4562/00.53 BN4546/01 BN4555/10
Options (available at extra cost): EST-120 only: Extended PRBS Option EST-125 only: French s/c bits GSM Large Frequency Offset All Ones/All Zeros Histogram Noise Measurement HCM Jitter Level Measurement Pulse Shape Analysis DTM-32 Remote Operation Software
BN4562/00.36 BN 4562/00.11 BN 4562/00.15 BN 4562/00.19 BN 4562/00.20 BN 4562/00.23 BN 4562/00.38 BN 4562/00.42 BN 4562/00.52 BN 4562/00.56 DTM32
Global Headquarters 20400 Observation Drive Germantown, Maryland 20876-4023 USA Toll Free 1-800-638-2049 Tel +1-301-353-1550 Fax +1-301-444-8468 www.acterna.com
Regional Sales Headquarters North America 20400 Observation Drive Germantown, Maryland 20876-4023 USA Toll Free 1-800-638-2049 Tel +1-301-353-1550 Fax +1-301-444-8468 Latin America Av. Eng. Luis Carlos Berrini 936 8/9. Andar 04571-000 Sao Paulo, SP Brazil Tel +55 11 5503 3800 Fax +55 11 5505 1598 Asia/Pacific 42 Clarendon Street PO Box 141 South Melbourne, Victoria 3205 Australia Tel +61 3 9690 6700 Fax +61 3 9690 6750 Western Europe Arbachtalstrasse 6 72800 Eningen u.A. Germany Tel +49 7121 86 2222 Fax +49 7121 86 1222
Note: Specifications, terms, and conditions are subject to change without notice. © Copyright 2001 Acterna, LLC. All rights reserved. Acterna, The Keepers of Communications, and its logo are trademarks of Acterna, LLC. All other trademarks and registered trademarks are the property of their respective owners.