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Telecommunications Consulting
The Local Exchange Routing Guide, called LERG, and the Terminating Point Master, called TPM, can be difficult to use to their full potential without a detailed understanding of them.
DOSHEL Services conducts 1-day and 1 ½ day seminars that contain a detailed description of these data, and provides other services to help you better advise the industry of your local network and to explain how to interpret descriptions of the local network of other service providers.
Background The LERG and TPM are issued monthly by the Telcordia Routing Administration (TRA), at Telcordia Technologies, Inc. The TRA is the telecommunications industry’s means of providing industry-wide notification of the opening of new Central Office Codes (COCs) and the routing and rating information associated with these codes. COCs are often referred to as NXXs and are always associated with an area code, or Numbering Plan Area (NPA). Hence, they are usually referred to as NPA NXXs. Every carrier to which a Central Office Code (that is, NPA NXX) is assigned must enter routing and rating data into the TRA databases or arrange for entry of the data by someone who has access to these databases. Every Long Distance carrier needs to know the end office switch in which the NPA NXX resides and to which access tandem the end office switch homes. Local carriers providing service in an area served by other local carriers need to know this information, too. Every company that does billing, whether they are a telephone company or billing service bureau, has available the TPM as the source of rate center vertical and horizontal coordinates (both major and minor), time zones, place names and other rating data that may be used in their billing systems..
Services Offered by DOSHEL Services
Routing and Rating Seminars include the following:
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Data Input Training Courses describe the following:
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Advanced Data Input and Data Analysis covers the following topics:
If you input your own records (you are an "AOCN"), this course may be for you! The TRA training provides the basics on accessing their databases and building records. Such training is invaluable, but also needed is an understanding of (1) how your interacting with the Incumbent Local Exchange Carrier (ILEC) at the access tandem requires you to monitor activities of the ILEC and (2) what you need to know to efficiently handle originating and terminating local traffic to reduce the incidences of blocked calls and need for manual intervention. (Back to Services Offered) (Back to Top)
Customized Telecommunications Consulting includes the following:
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Donald Baechler participated in the development and delivery of the TRA Routing & Rating Workshops and data input training courses (see "Related Sites" below) prior to June 1999, during the time that he was the Director of the Traffic Routing Administration. He is a Registered Professional Engineer with experience in aerospace systems engineering, electronic countermeasures systems analysis, telephone network operations and regulatory matters, and, from 1986 to 1999, Director, Traffic Routing Administration, the predecessor to the Telcordia Routing Administration. In the latter position, he has been involved in the resolution of issues in industry forums and in the development and delivery of TRA services in a rapidly changing telecommunications environment. Related Sites The TRA offers a Routing & Rating Workshop and data input training, in addition to issuing the monthly LERG and TPM and providing many other industry services. All of these offerings can be reviewed at The TRA Routing & Rating Workshops have been offered by the TRA four times each year and various registration fees have been charged. The data input training is offered four times each year by the TRA and is open without registration fee to any participant with whom the TRA has a Fair Share Plan contract. Access to the TRA databases is restricted to participants in the Fair Share Plan but participation is open to anyone, as described at the TRA web site. Customized Services DOSHEL Services can deliver Routing & Rating Seminars and/or data input training at your business location and can structure both the seminars and the training to focus on your company’s needs. If you can't wait until the next quarterly offering of TRA's Rating and Routing Workshop and/or training, or if you have been unable to find the routing and rating help needed by your company, please email us at or fax us at (928) 752-7406
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Copyright ©2001-2007 All rights reservedDOSHEL Services Last updated July 21, 2007 |