DMS-100 Family DMS-100 Ringing System BASE15 and upxiAbout this documentWhen to use this documentThis document describes the DMS-100 ringing system. It is intended as ageneral reference for operating company personnel responsible forengineering, administration, and maintenance of the DMS-100 ringing system.How to check the version and issue of this documentThe version and issue of the document are indicated by numbers, for example,01.01.The first two digits indicate the version. The version number increases eachtime the document is updated to support a new software release. For example,the first release of a document is 01.01. In the next software release cycle, thefirst release of the same document is 02.01.The second two digits indicate the issue. The issue number increases each timethe document is revised but rereleased in the same software release cycle. Forexample, the second release of a document in the same software release cycleis 01.02.To determine which version of this document applies to the software in youroffice and how documentation for your product is organized, check the releaseinformation in Product Documentation Directory, 297-8991-001.This document is written for all DMS-100 Family offices. More than oneversion of this document may exist. To determine whether you have the latestversion of this document and how documentation for your product isorganized, check the release information in Product Documentation Directory,297-8991-001.References in this documentThe following documents are referred to in this document:• Product Documentation Directory, 297-8991-001• Subscriber Carrier Module-100 Rural General Description,297-1001-064