Ericsson LBI-39224 manual Getc, Hdlc, Hscx, Imc

LBI-39224

GETC

Ericsson General Electric Trunking Card – The GETC is a microprocessor-controlled shelf that can be configured to perform many different signal processing tasks for EDACS radio communications equipment. In CEC/IMC applications, each GETC is equipped with a 9600 baud modem that provides serial control data communications between different radio systems.

GSC bus

Global Serial Channel bus – The GSC bus is a high-speed serial bus which provides packetized control data transfers between Controller Boards in the CEC/IMC Digital Audio Switch.

hard patch

See Causeway patch.

hard simulselect

See Causeway simulselect.

HDLC

Highlevel Data Link Control – A standard bit-oriented protocol developed by the International Standards Organization (ISO). With HDLC, errors are less likely to occur because control information is always placed in the same position and specific bit patterns used for control are much different from those used in representing data.

HSCX

Highlevel Serial Communications Controller eXtended – The HSCX is an integrated circuit (IC) designed to implement high-speed communications links using HDLC protocols and to reduce the hardware and software overhead needed for serial synchronous communications.

IMC

Integrated Multisite and Console Controller – The IMC is Ericsson's EDACS Digital Audio Switch that routes audio, mobile data, and Aegis data between EDACS radio systems and dispatch consoles. It is a second generation multisite controller plus a console controller for the C3 series consoles.

interface module

The term "CEC/IMC interface module" is used to refer to a subset of hardware components within the CEC/IMC that permits it to be connected or linked to an external device such as a dispatch console or an EDACS radio system. Each interface module is formed by a Controller Board and usually one or more Audio Boards. This term replaces the term "subsystem" and it may sometimes be referred to as a "node." Examples of CEC/IMC interface modules include: MIM, CIM, LRIM, VMIM, and RIM.

G-6