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When an agency writes a Telecommunications Service Request (TSR) for an ISDN change or install, a set sheet should be submitted with the TSR. Choose the appropriate form below for the telephone set you are using. Questions you have while filling out the set sheet can be answered by any of the representatives in the Telecommunications Customer Service Section at 804-416-6984.

Configuration Groups

For Custom ISDN, a configuration group is a template built in the central office switch that defines ISDN features and call appearances on specific buttons of customer provided equipment (CPE). Since there are many types of CPE, there are multiple configuration groups. Many customers may use the same configuration group, rather than building one for each individual customer. Configuration groups are specific to each central office.

You can find configuration groups noted on set sheets that have been faxed to you by TCS after a recent order was processed. Check the features and their locations to see if they could be used for your new application. If you need help in finding an existing configuration group that meets your needs or you need to know the configuration group of an existing line, call a TCS representative.

VITA Telecommunications planners should have examples of commonly used configuration groups. As an example, below is how configuration group COV 126 out of the Grace Street Central Office is set up:

  • Button 26 - Exclusion
  • Button 27 - Auto Call Back
  • Button 28 - Call Forwarding Variable
  • Button 29 - Intercom 1
  • Button 30 - Call Pick Up

For National ISDN, there are no set configuration groups. The features are key mapped onto the buttons.


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