Ericsson LBI-39224 Causeway Patch / Simulselect, Local/Remote Conventional Channel Dispatch, 152

LBI-39224

Local/Remote Conventional Channel Dispatch

After a console has received the System Manger conventional channel database information and its privilege list, local and remote conventional channel communications operate almost identically. The console operator can program the channel to a communication module, dispatch to the channel, exercise any available conventional channel relay function (local/remote, main/standby, etc.), or patch/simulselect the channel to other conventional channels or trunked groups.

To a dispatcher, the only operational difference between local and remote conventional channels is a call to a remote conventional channel could be queued at the NIM if all NIM channels are currently busy. In this case, similar to when a trunked group call is queued, a "Queued at NIM Site" call status is displayed at the console.

3.14.2 Causeway Patch / Simulselect

Direct conventional channel patching and simulselecting is provided by the Causeway patch and Causeway simulselect features. These features allow direct patching/simulselecting of a conventional channel to a trunked talk group. A Causeway patch/simulselect exists only in the CCI and VMIM Controller Boards. The CCI and VMIM use the trunked talk group ID (GID) number for Causeway patch/simulselect communications. All conventional channels within a CEC/IMC Digital Audio Switch (64 maximum) may be Causeway patched/simulselected. Consoles and trunked sites in the CEC/IMC network know nothing about Causeway patches or Causeway simulselects. These features were previously referred to as "hard patch" and "hard simulselect" respectively.

In contrast, traditional patches/simulselects performed at consoles (which may be thought of as "soft" patches/simulselects) each use a special group ID number referred to as a System Assigned ID (SAID) number. SAIDs are transferred throughout the CEC/IMC network.

SAIDs are not used for Causeway patches/simulselects. Soft patches/simulselects are only set-up at the consoles, not the CEC/IMC Manager or System Manager.

Causeway patch/simulselect advantages over "soft" (console) patch/simulselect include:

–trunked radios may scan into conventional channel originated calls since the talk group ID (GID) is used

–operation in Site Controller mode and Failsoft mode

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