Ericsson LBI-39224 Site assignment number, StarGate Controller, StarGate Manager, TDM bus

LBI-39224

site

This term normally refers to radio equipment at a single specific location. (Also see site assignment number.)

site assignment number

In most cases, the term "site" in this program does not refer to an EDACS trunked site or any other type of radio system. It refers to a site-type interface module within the CEC/IMC/StarGate Controller/etc. Digital Audio Switch. The number that follows is the interface module's site assignment number. This number corresponds to and matches the site assignment number set by the 5-bit DIP switch setting on the interface module's Controller Board.

StarGate Controller

A StarGate Controller is an IMC switch specifically configured for distributed multisite operation. It is the central point or "hub" for all distributed multisite communications. A StarGate Controller is formed by NIM interface modules and a MOM interface module.

StarGate Manager

When connected to a StarGate Controller, the CEC/IMC Manager may be referred to as a "StarGate Manager." (Also see CEC/IMC

Manager and StarGate Controller.)

TDM bus

Time Division Multiplexed bus – The TDM bus in the CEC/IMC Digital Audio Switch is a digitally multiplexed bus system used to transfer audio, mobile data, and Aegis data throughout the CEC/IMC. Each signal coming into the CEC/IMC is assigned a TDM time slot and receiving devices extract the digitized signals from the appropriate time slot.

tone control

The use of audio tones for remotely controlling a base station over a communication path, eliminating the need for a metallic circuit.

tracking

In a multisite network all active radios log into their particular system. This login information is databased to allow the CEC/IMC to track individual radio units as they move from system to system. The CEC/IMC can then route wide area calls based on this database.

transmission trunked call

A transmission trunked call is a call which is assigned a working channel only for the duration of the caller's PTT sequence (the call operates with zero hang-time). Individual and group calls are transmission trunked calls. Because EDACS has fast channel access and drop times, transmission trunking is significantly more efficient than message trunking. (Also see message trunked call.)

G-10