ZyXEL Communications U-1496 series Spezifikationen PDF herunterladen (Seite 21)

GLOSSARY AE/LZB 119 1889 R1A

GLOSSARY

Backup Serial Line ....................................... The Backup Serial Line (BSL) is a data bus connected to all Station and

Downlink GETCs at a site. The BSL is used for communications during Failsoft

Trunking. For SIM applications, the BSL is also connected the SIM.

BSL............................................................... See Backup Serial Line.

Control Channel............................................ A Control Channel is any allowed radio channel (only one at a time) at an

EDACS Trunked Site that is used for call requests and Working Channel

assignments for trunked calls.

EDACS......................................................... EDACS, short for Enhanced Digital Access Communications System, is a

registered trademark of Ericsson Inc. It is used by Ericsson to describe specific

communications systems and their specific equipment which meet or exceed the

needs of the Public Service, Industrial, Commercial, and Utility markets world-

wide.

EDACS Trunked Site.................................... An EDACS Trunked Site is a location having three or more EDACS Repeaters

operating together under the direction of a Site Controller computer or the

Control Channel GETC.

Frame Sync Line........................................... The Frame Sync Line is a +13.8 VDC bus, with periodic negative pulses (to 0

VDC), originated by the Control Channel GETC and used by the Working

Channel GETCs to synchronizing messages to mobiles.

FSL ............................................................... See Frame Sync Line.

GID............................................................... See Group ID.

Group ID....................................................... A Group ID is a unique number used to identify a specific collection of radio

units that normally communicate with each other in an EDACS trunked system.

SCAT............................................................ Single Channel Autonomous Trunking is the name of a trunked system

consisting of a single Failsoft repeater and a Downlink GETC.

SIM............................................................... See Site Interface Module.

Site Interface Module ................................... The Site Interface Module provides an interface between a System Manager and

the controlling GETC in a system that does not have a Site Controller.

Working Channel.......................................... A Working Channel is any radio channel at an EDACS Trunked Site that is

available or in use to carry trunked calls.

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ZyXEL Communications U-1496 series Spezifikationen Seite 21