Subject : VIOP F M : 200
Paper Code : MT 0049 P M : 100
Semester : Fourth Time: 03:00 Hrs
· .
Group “A”
A. Select the best answer from alternates: 10X1=10
1. What is the full form of PSTN?
(a) Public Switched Telephone Network
(b) Private Switched Telephone Network
(c) Public Sector Transfer Network
(d) Public Switched Transfer Network
2. Who invented Telephone?
(a) Right Brothers (b) Alexander Grahm Bell (c) Sir Isac Newton (d) Einstein
3. The first telephone was invented in
(a) 1700 (b) 1800 (c) 1876 (d) 1896
4. In the past, the telephone with no dialing system was called-
(a) Ring-Down System [ Ring Down Circuit]
(b) Ring-Up System
(c) Non-Ring System
(d) Non of the above
5. If 5 people wanted to talk to each other with no switching system, how many cables are required?
(a) 10 (b) 20 (c) 30 (d) 5
6. What is the technique used to convert analog signal into digital?
(a) PCM (b) CPM (c) TDM (d) FDM
7. The standard analog BW in telephone line is:
(a) 2 KHz (b) 3 KHz (c) 4 KHz (d) 5 KHz
8. The connection between switching office to switching office is called:
(a) Loop (b) Trunk (c) Optical Line (d) Non of the above
9. CAS stands for:
(a) Channel Associated Service (b) Channel Associated Signaling (c) Channel Alternate Signaling (d) Consultative Associated Signaling
10. The T1 line has the combination of
(a) 2B+D (b) 20B+D (c) 23B+D (d) 32B+D
B. Select the best answer from the alternates given: 10X2=20
1. The Digital Bandwidth of PSTN line is:
(a) 32 Kbps (b) 56 Kbps (c) 64 Kbps (d) 96 Kbps
2. The BW of T1 line is:
(a) 1 Mbps (b) 1.544 Mbps (c) 2 Mbps (d) 2.048 Mbps
3. FCS stands for:
(a) Field Check Sequence
(b) Field Control Sequence
(c) Frame Control Sequence
(d) Frame Check Sequence
4. DTMF uses …………… signals to send a digit from telephone set to control office:
(a) 1 (b) 2 (c) 3 (d) 4
5. TCAP stands for:
(a) Transfer Capabilities Application Part
(b) Transaction Capabilities Application Part
(c) Transfer Control Application part
(d) Non of the above
6. T1 line is popular in-
(a) Asia (b) Europe (c) Africa (d) North America
7. ITU-T International Numbering plan is based on the sequence:
(a) CC+SN+NDC
(b) CC+NDC+SN
(c) SN+CC+NDC
(d) NDC+CC+SN
8. In Basic Call Setup and Teardown, ANM is
(a) Another Message
(b) Anonymous Message
(c) Answer Message
(d) Analytical Message
9. In ISDN, TA equipment stands for-
(a) Telephone Adaptor (b) Transmission Address (c) Technical Adaptor (d) Terminal Adaptor
10. In SS7 Network, F-Link is in between-
(a) STP to STP (b) SSP to SSP (c) SCP to SCP (d) Non of the above
C. Select the best alternate: 5X4=20
1. If an analog BW of voice channel is 4 KHz and quantization rate is 8-bit, what is the digital BW as per Nyquist Theorem?
(a) 14 Kbps (b) 33 Kbps (c) 56 Kbps (d) 64 Kbps
2. How many total different frequency signals are used in DTMF to make possible to send a digit from telephone set to switching office?
(a) 2 (b) 4 (c) 6 (d) 16
3. In ISDN, the BW is in terms of 2B+D, where B has BW of:
(a) 8 Kbps (b) 16 Kbps (c) 32 Kbps (d) 64 Kbps
4. In SONET, OC-3 has BW of:
(a) 155.52 Mbps (b) 622.08 Mbps (c) 2.488 Gbps (d) 4.148 Gbps
5. Which of the following is the business service of PSTN?
(a) VPN (b) Centrex Service (c) Call Center Service (d) All of the above
D. Subjective Questions: 5X10=50
1. What are the Plain Old Telephone Services?
2. Draw the SS7 network Architecture.
3. Draw the ISDN BRI Reference Points?
4. What are the capabilities and functions of ISDN?
5. What are the signaling systems used in PBX?
