This set of Wireless & Mobile Communications Multiple Choice Questions & Answers (MCQs) focuses on “Cordless Telephone Systems”.
1. Which of the following is a protocol used for cordless telephone system?
a) PACS
b) ERMES
c) IS-95
d) FLEX
View Answer
Explanation: PACS (Personal Access Communication System) is a protocol used for cordless telephone system. ERMES and FLEX are used by paging system. And IS-95 is used for cellular system.
2. In which frequency range do the cordless phones mostly work?
a) 43-50 MHz
b) 88-108 MHz
c) 540-1600 KHz
d) 200-540 KHz
View Answer
Explanation: Cordless phones mostly operate in the frequency range of 43-50 MHz. The frequency range of FM is 88-108 MHz and for AM is 540-1600 KHz.
3. Which of the following is the drawback for cordless telephones?
a) Wireless technology
b) Limited coverage area
c) Mobile
d) Security
View Answer
Explanation: Cordless telephone systems are wireless, but they have a disadvantage of limited coverage area with cell size of approx. 300 m. Being digital, they have very less chance of eaves dropping.
4. Which of the following is a fully digital cordless system?
a) CT0
b) CT1
c) CT1+
d) DECT
View Answer
Explanation: Digital enhanced cordless telecommunication (DECT) is a fully digital system established in 1991. CT0, Ct1, Ct1+ were analog systems established in 1980, 1984 and 1987 respectively.
5. Which of the following is an example of local wireless system?
a) GSM
b) Cordless telephone system
c) UMTS
d) EDGE
View Answer
Explanation: GSM, UMTS and EDGE covers worldwide area whereas cordless system has vey less coverage area.
6. Which of the following is not a standard for cordless telephony?
a) CT-2
b) DECT
c) UMTS
d) PHS
View Answer
Explanation: CT-2 is a cordless telephone standard used in Europe and Asia. DECT and PHS (Personal Handyphone System) are cordless telephone standards used in Europe and Japan respectively. UMTS is a cellular system standard.
7. What is the range of cell diameter of DECT?
a) 300 m
b) 2 km
c) 10 km
d) 70 km
View Answer
Explanation: DECT has the cell diameter of 300 m from the base station while GSM is designed for outdoor use with a cell diameter of 70 km.
8. Which of the following standard of cordless telephone system is also approved as a 3G standard?
a) PHS
b) PACS
c) DECT
d) CT2
View Answer
Explanation: DECT fulfills the IMT 2000 requirements and is approved as a 3G standard by ITU (International Telecommunication Union).
9. Cordless telephone system will not work under which of the following criteria?
a) Within a home
b) Within a building
c) Within campus
d) Within a city
View Answer
Explanation: Cordless telephones are used in homes, in offices, on campus, at trade shows. But due to their limited coverage they cannot cover a whole city.
10. Which of the following is not an application of DECT?
a) Multimedia processing
b) Cordless private branch exchange
c) Wireless local loop
d) Home cordless phones
View Answer
Explanation: Users in a neighborhood served by a telephone company wired local loop can be connected by a cordless phone that exchanges signals with a neighborhood antenna.
Sanfoundry Global Education & Learning Series – Wireless & Mobile Communications.
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