Ericsson LBI-39224 Conventional Channel Configuration, StarGate Network Conventional Channels

LBI-39224

3.14CONVENTIONAL CHANNEL CONFIGURATION

The VMIM interface module and CIA secondary interface rack couple conventional tone or DC controlled base stations and conventional voting systems to the CEC/IMC switch. Each VMIM/CIA set can provide thirty-two CEC/IMC conventional channel interfaces, and a CEC/IMC may be equipped with two VMIM/CIA sets, providing up to sixty-four conventional channel interfaces per CEC/IMC.

The CIA rack is considered a secondary CEC/IMC interface module since is not a part of the primary CEC/IMC backplane structure. Each CIA rack is connected to a VMIM by 4-wire audio links (one per channel) between the VMIM Audio Boards and the CIA rack CI Boards, and a single full-duplex serial control data link between the VMIM Controller Board and the CCI Controller Board. The CIA appears to a VMIM as an EDACS trunked site with one or more units logged on. Each unit represents a conventional channel with System Manager LID database programming and/or CEC/IMC Manager conventional channel programming.

Required conventional channel configurations at the CEC/IMC Manager include both VMIM-related channel configurations and Conventional Interface Adapter (CIA) rack-related channel configurations. This section primarily describes configurations which effect the main components of a CIA rack—the Conventional Control Interface (CCI) Board and the Conventional Interface (CI) Boards.

As described in the following section (StarGate Network Conventional Channels) a StarGate network supports 255 conventional channels by spreading VMIM/CIA conventional interface sets across multiple CECs and/or IMCs in the StarGate network. For those CEC/IMCs which are not part of a StarGate network the following section may be skipped over for now, and Conventional Channel Configuration continued with Section 3.8.4, VMIM Channel Configuration, on page 3-82 followed by Conventional Channel Configuration, Section 3.14.3 on page 3-155.

3.14.1 StarGate Network Conventional Channels

A StarGate network will support up to 255 conventional channels spread out over several CEC/IMCs. For example, in a StarGate network four (4) CEC/IMCs may each contain 64 conventional channels (max per CEC/IMC, 256 ÷ 64 = 4, with one less conventional

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