Which one isn’t the network element in a typical cellular telecommunication network?
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These services on the below are what MSC provide except ( ).
A. Switches voice traffic from the PSTN to the PSTN if the call is a landline -to-landline call
B. Switches voice traffic from the wireless network to the PSTN if the call is a mobile-to-landline call.
C. Switches to another MSC within the wireless network if the call is a mobile-to-mobile call.
D. Provides telephony switching services and controls calls between telephone and data systems.
These descriptions is all about BS, which one is correct ( )?
A. BS is the component of the wire network access infrastructure.
BS terminates the air interface over which the subscriber traffic is transmitted to and from a mobile station.
C. BS is called a Base Transceiver Station.
D. A, B and C
Which one is incorrect about HLR ( )?
A. The HLR is a database that contains information about subscribers to a mobile network.
B. the HLR might contain the service profiles of visiting subscribers.
C. The HLR uses the subscriber information supplied by the itself to authenticate and register the subscriber.
D. The HLR stores “permanent” subscriber information, including the service profile, location information, etc.
Which one is incorrect about VLR ( )?
A. The VLR is a database that is maintained by an MSC.
B. VLR store temporary information about all subscribers.
C. VLR communicates with the HLR of the roaming subscriber to request data.
D. VLR maintain information about the subscriber’s current location in the network
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