Working project for the replacement of a telephone switch, the main technical solutions:
- Replacement of the TELSUD telephone communication switch with the Region DXE switch in the TsRP-2 building;
- Installation of an information cabinet 27U, removable and retractable blocks DXE-16, SLB7-08, DTB7, COB7-04, an additional Ethernet switch board;
- Installation of software, licenses and equipment for archiving subscribers' conversations;
- Installation of a telecommunication cabinet 27U;
- Installation of ATS and UPS in the information cabinet.
For the organization of telephone communication, a multi-service switching platform for operational wired communication REGION-DXE, manufactured by AM TELECOM LLC, Russia, is used.
Purpose and technical description: Region-DXE office automatic telephone exchange (hereinafter referred to as PBX) is used on the telecommunication network of the Russian Federation as a terminal equipment that performs the functions of switching systems with the implementation of IP functions, CSIS.
Implemented interfaces: ISDN primary (30B D) access interface, two-wire analog interface to communication network (FXO), two-wire analog interface to subscriber equipment (FXS), Ethernet data network access interfaces (10Base-T/100Base-TX), digital interface for connecting system telephones.
Functions performed: connection of PBX subscribers to the public communication network, connection of PBX subscribers to each other, call forwarding, registration of conversations of PBX subscribers, notification of PBX subscribers.

Format - DWG compatible with AutoCAD 2004-2017, Compass, ZWCAD, nanoCAD, BricsCAD, etc.