T1 E1 Testing

Synchronous Record-Playback for Mission Critical Data

Synchronous Trunk Record/Playback


GL’s Synchronous Trunk Record-Playback (or STRP) application has both Record and Playback features that permits the user to synchronously record any type of traffic (voice, digits, and tones) on many complete T1 or E1 line (trunk) with accurate timestamp. Playback of some or all the recorded data permits the user to recreate the transmission exactly as it occurred. Relative time synchronization to microsecond accuracy is easily achieved.

The STRP application records live T1 E1 traffic and saves it to a file in FILE-TIME structure. This naming convention is based on coordinated universal time (UTC) with the precision of 100 nano seconds intervals. UTC-based time is loosely defined as the current date and time of day in Greenwich, England.

Possible applications include:

  • A dispersed / coordinated mission that involves long and large communications over standard T1 E1 lines.  Such a mission can be recorded and replayed  precisely for diagnostic, regression, and training purposes
  • Record and Replay  of precise and exact full duplex T1 E1 communications during a 1st Responder / Homeland Security crisis
  • Record and Replay of critical periods in a crisis

Main Features

  • Record traffic on all 24 T1 channels (or all 32 E1 channels) for a specified duration or continuously
  • The Keep Latest recording option allows the user to retain recently recorded traffic based on hour minutes and seconds
  • Supports multiple instances of STRP application to record on different/same Trunks
  • For large capacity, GL’s Octal T1 E1 boards can record and playback on up to 192 T1 channels and 256 E1 channels per board. More scalability can be achieved with multiple boards
  • Synchronously Record & Playback live T1 E1 traffic on multiple T1 E1 trunks
  • Schedule recording to auto start recording of T1 E1 traffic on a specified Date and Time (Day, Month, Year, Hour, Minute, and Second)
  • The recorded files can be played back with the Playback feature
  • Recording is performed using A-Law, and µ-Law codec
  • Mark the events as you playback recorded files. Jump to the event directly to start playing back from this event point
  • Most valuable application for critical data analysis in defense and research activities

Recording Feature

Records all the incoming T1 E1 traffic on the selected T1 E1 ports (lines).

Limited Recording

Records Live T1 E1 traffic for a specified duration of time. The Countdown Time display remaining time duration.

Schedule Recording

Automatically start recording Live T1 E1 traffic as per the schedule. Traffic can be recorded continuously or for a specified duration.

Recording option

Playback Feature

Playback feature provides options to load the recorded files per Mission. Once the file is loaded, you can observe the Mission Name, total duration, Start and End time of the recorded file.

User Defined Events

During playback events can be marked and defined at a particular time. Once the event is defined, user can jump to the event time position. For example, if there are two different voices recorded in the file, then user can mark and jump to that event to listen to a particular voice.

Playback option

Playback Tools

Provides Play, Continuous Playback, Pause, Stop, Backward, and Forward features to listen to a recorded file.

Playback tool

Other Record and Playback Applications

Other Record and Playback applications available with T1 E1 Analyzer are listed below -


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 No. Item Description
XX051 Synchronous Trunk Record Playback
(Includes Many Other Record Playback Apps - see list above)
  Related Software
XX020 Record/Playback File Software 
(Including Automated Continuous Capture and Automated Record Playback Software)
XX634 Multi-Channel HDLC Emulation and Analysis & File based High Throughput HDLC Record/Playback
XX610 File based Record/Playback (Client side) ClientDataTxRx (Server side)
XX640 File based HDLC Record/Playback
XX650 File based HDLC Record/Playback over SA-bits
XX660 File based Record/Playback over FDL
  Related Hardware
PTE001 tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software
XTE001 Dual T1 E1 Express (PCIe) Boards (requires additional licenses)
TTE001 tScan16™ T1 E1 Boards
FTE001 QuadXpress T1 E1 Main Board
ETE001 OctalXpress T1 E1 Main Board plus Daughter Board
PTE025 Data Communications Board for RS-232, RS-449, RS-422, RS-423, EIA-530, V.35 Interfaces

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