8. Supplementary Services
8.1 Monitoring via LDS
The LDS can listen to designated BWCs or groups. When the listened BWC or group involves in a voice call
or message, the LDS also receives the voice call or message without noticing the BWC or group.
8.2 Override
The LDS can forcibly terminate a listened ongoing voice call and release the channel resource.
8.3 Interrupt
When a BWC user is speaking in a voice call, the LDS can forcibly interrupt the speaking subscriber and
obtain the floor.
8.4 Stun
The LDS sends a stun command to the BWC, and disables the functions of the BWC. A stunned BWC can
only log in and out of the system, but cannot perform other services.
8.5 Revive
The LDS sends a revive command to the BWC, and restores the stunned BWC with disabled functions. The
revived BWC can work normally and perform the services.
8.6 Location Service
The location server subscribes the location information of the BWCs, and receives real-time BWC location
report. Then the LDS subscribes the BWC location information directly from the location server.
8.7 LDS Subscription
The LDS subscribes information such as the device information, group information and call information
from the server. Upon receiving the subscription request, the server sends back the requested information
to the LDS. When the subscription is modified, the server sends the requested information to the LDS
automatically. The information for subscription includes the correspondence between device and group,
subscriber registration status, subscriber call status, group call status and the system online call status.
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