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Correct answer is (b) False

To elaborate: FIRST GENERATION CELLULAR systems PROVIDE connection oriented services for each voice user. Voice channels are dedicated for users at the serving base STATION.

Right choice is (a) True

Explanation: A problem unique to wireless NETWORKS is the extremely hostile and random nature of the radio channel, and SINCE users may REQUEST service from any physical location while traveling over a wide range of VELOCITIES.

Right ANSWER is (c) Public, two way

To elaborate: RAM Mobile Data (RMD) is a public, two way data service based upon the Mobitex protocol developed by Ericsson. RAM PROVIDES street LEVEL coverage for short and long MESSAGES for users moving in an urban environment.

Right option is (C) IS-41

For explanation: US cellular carriers implemented the network PROTOCOL standard IS-41 to allow different cellular systems to automatically accommodate SUBSCRIBERS who roam into their coverage region.

The correct answer is (d) LOW rate

Explanation: First generation WIRELESS SYSTEMS provide analog speech and INEFFICIENT, low rate, data transmission between the BASE station and mobile user.

The CORRECT OPTION is (c) Common air interface

The best I can explain: To connect mobile subscribers to the base stations, radio links are ESTABLISHED using a carefully defined communication protocol called common air interface (CAI) which in essence is a PRECISELY defined handshake communication protocol.

Right choice is (c) CCITT

Explanation: SS7 is an outgrowth of the out of BAND signalling FIRST developed by the CCITT under common channel signalling standard, CCS no. 6.

Correct option is (d) B-ISDN

The explanation: Emerging NETWORKING technique, broadband ISDN (B-ISDN) is based on asynchronous transfer mode (ATM) technology. It allows packet switching rates up to 2.4 GBPS and TOTAL switching capacities as high as 100 Gbps.

The correct choice is (b) False

Explanation: ISDN END USERS may select between two DIFFERENT interfaces. The BRI (basic rate interface) is intended to serve SMALL capacity terminals while the PRI (primary rate interface) is intended for LARGE capacity terminals.

Correct choice is (B) False

To EXPLAIN: At the base STATION, the air INTERFACE portion (i.e., signalling and synchronization data) of the mobile transmission is discarded, and the remaining voice traffic is paased along to the MSC on fixed networks.

Right answer is (b) False

The explanation is: In contrast to circuit switching, packet switching provides excellent channel efficiency for bursty DATA transmission of SHORT length. An advantage of packet SWITCHED data is that the channel is UTILIZED only when sending or receiving bursts of INFORMATION.

Correct CHOICE is (C) Access signalling

The best I can explain: Access signalling SUPPORTS traffic between the end user and the network. It DEFINES how end USERS obtain access to the PSTN and the ISDN for communication or services.

Right option is (d) Virtually static, highly dynamic

Explanation: The network configurations in the PSTN are virtually static, SINCE the network connections may only be changed when a subscriber changes residence. WIRELESS networks are highly dynamic with the network configuration being rearranged EVERYTIME a new subscriber MOVES into the coverage region of a different base station.

Right ANSWER is (a) True

Best explanation: The MSC is able to DISTINGUISH home users from roaming users based on the MIN of each active user, and maintains a REAL TIME user list in the home location REGISTER (HLR) and visitor location register (VLR).

Correct CHOICE is (b) False

The explanation: ATM SUPPORTS bidirectional transfer of DATA packets of fixed length between TWO end POINTS. It preserves the order of transmission.

Right ANSWER is (b) False

To explain: ISDN PROVIDES integrated end-user ACCESS to both CIRCUIT switched and packet switched networks with digital end-to-end connectivity.

Right ANSWER is (a) Public SWITCHED telephone network

To elaborate: PSTN stands for public switched telephone network. The PSTN forms the global TELECOMMUNICATION grid which connects conventional telephone CENTERS with MSCs THROUGHOUT the world.

The correct choice is (a) TOUCHSTAR

For explanation: Touchstar is one of the three MAIN type of services offered by SS7. It provides services such as CALL return, call forwarding, REPEAT dialling, call block, call TRACING and caller ID.

Correct choice is (a) True

Explanation: Alternate billing service and LINE information DATABASE use the CCS network to enable the CALLING party to bill a call to a personal number (THIRD party number, calling card, or collect ETC.) from any number.

Correct answer is (c) IMTS-2000

The BEST I can EXPLAIN: FPLMTS (FUTURE Public Land MOBILE Telecommunication Systems) is more RECENTLY been called International Mobile Telecommunication (IMT-2000). It implies emerging third generation wireless systems for hand held devices.