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Newsletter: GL Announces Enhanced
Call Management Utility (CMU)

Welcome to a December 2013 issue of GL's Newsletter providing information and insight into our enhanced Call Management Utility (CMU) software.


Managing recorded voice calls is essential especially when recording for extended periods of time. The job of manipulating recorded voice calls is easier when calls can be sorted or filtered by called or calling number, time of day, or length of call. 

GL's Call Management Utility (CMU), coupled with the GL's T1 E1 Call Capture and Analysis (CCA) application provides all the necessary management tools to perform exactly such monitoring functions for ISDN, SS7, and CAS calls over T1 or E1 networks. Call records are immediately generated, indexed, and displayed once a voice recording over T1 or E1 lines is completed by the CCA. The most important feature of CMU is the ASR Listener, which provides the capability to remotely access the recording in progress (real-time). As indicated in the block diagram above, CMU can work with multiple GL's T1 E1 CCA probes using ASR listener to monitor call recording remotely. 

Call Management Utility (GUI)

Post Processing Capabilities

Filter Calls of Interest

Recorded calls can be further filtered or played back or analyzed as required. All relevant information associated with each recorded call is included e.g. timestamp, direction, timeslot, length of call, size of file, calling #, called #, crv and voice file name. The user has the option to display all "in-process" calls (shows real-time capturing information) or a user-defined filtered list of all completed calls. 

Filter Options

Audio playback of completed and captured calls is easily accomplished with the CMU. A captured call can instantly be played to the PC speakers, either the East direction, or the West direction, or both directions simultaneously. The user may also display the captured call to a waveform viewer for further analysis. 

Log Files

The CMU's Post Processing capability allows the user to import a previously saved log file, or an instance, or the captured files from the call capture directory. When importing, the user has the option of adding a filter to the search criteria. Thus, the user may import all voice files or import only those that adhere to the search criteria.

Playback Audio Files

Any call can be viewed, played if the captured file still exists in the call capture directory, and can be edited. The following audio parameters can be set to play an active or completed call over T1 or E1.

Audio File Options

Below is a captured call with both directions shown. 


The CMU will automatically sort and display all call records and produce the statistics associated with the voice files. Statistics of the calls such as record number, size of the call, and length of the call can be obtained for the all completed and filtered calls. 

Custom statistics can also be obtained for the specific calls across multiple instances based on the timestamp, direction, timeslots, length of call, size of file, calling #, called #, crv, and voice file name. 

Call Statistics

Important Features

  • Complete Call Records for each captured file
  • Filter/Search for specific calls
  • Post Process capability to view the directory of captured files, log files and instances
  • Streaming audio files over TCP/IP and playback voice on either East, West, or both directions simultaneously
  • Real-time Voice playback (during active call) and post-processing Voice playback (after call is completed)
  • Statistics of all Call Records.
  • Complete Automated T1 and E1 Voice Logger

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