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LDCE Wireline > Signalling, SSTP, SIGTRAN, SIP, MEGACO > Flashcards

Signalling, SSTP, SIGTRAN, SIP, MEGACO Flashcards

1
Q

Ring back, tone and ringing current are always transmitted from
1) calling subscriber exchange
2) called subscriber exchange

A

called subscriber exchange

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2
Q

busy tone and recorded announcements are always transmitted from
1) calling subscriber exchange
2) called subscriber exchange

A

calling subscriber exchange

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3
Q

This may be used to operate special
equipment attached to the calling subscriber, e.g., short-circuiting the transmitter of a
CCB, till a proper coin is inserted in the coin-slot.
1) Answer Back Signal
2) Release signal
3) Permanent Line (PG) Signal

A

Answer Back Signal

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4
Q

As soon as the called subscriber lifts the handset, after ringing, a battery reversal signal is transmitted on the line of the calling subscriber. This is
1) Answer Back Signal
2) Release signal
3) Permanent Line (PG) Signal

A

Answer Back Signal

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5
Q

?? When the calling subscriber releases i.e., goes on hook, the line impedance goes high. This is
1) Answer Back Signal
2) Release signal
3) Permanent Line (PG) Signal

A

Answer Back Signal

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6
Q

This signal is sent to the calling subscriber if he fails
to release the call even after the called subscriber has gone on-hook and the call is released after a time delay.
1) Answer Back Signal
2) Release signal
3) Permanent Line (PG) Signal

A

Permanent line or permanent glow (PG)

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7
Q

________ signal may be sent, in case the subscriber takes too long to dial.
1) Answer Back Signal
2) Release signal
3) Permanent Line (PG) Signal

A

Permanent line or permanent glow (PG). It is normally a busy tone.

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8
Q

Release signal is normally of more than _____ milliseconds duration
1) 100
2) 200
3) 500

A

500

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9
Q

Calling Subscriber Line Signaling
1) Answer Signal
2) Answer Back Signal
3) Ringing Signal
4) Register Recall Signal

A

Answer Back Signal

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10
Q

Called Subscriber Line Signaling
1) Address signal
2) Answer Back Signal
3) Permanent Line (PG) Signal
4) Register Recall Signal

A

Register Recall Signal

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11
Q

When the called subscriber, lifts the hand-set on receipt of ring, the line impedance goes
low. This is
1) Answer Signal
2) Answer Back Signal
3) Release Signal
4) Register Recall Signal

A

Answer Signal

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12
Q

This is detected by the exchange which cuts off the ringing current and ring-back
tone.
1) Answer Signal
2) Answer Back Signal
3) Release Signal
4) Register Recall Signal

A

Answer Signal

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13
Q

The signal to recall the dialling phase during the talking phase
1) Answer Signal
2) Answer Back Signal
3) Release Signal
4) Register Recall Signal

A

Register Recall Signal

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14
Q

The two type of digital inter-exchange signaling are
(w.r.t channels)

A

channel associated signaling
and common channel signaling

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15
Q

per-trunk signalling is
1) channel associated signaling
2) common channel signaling

A

channel associated signaling

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16
Q

____ are generally exchanges
1) SP
2) STP

A

SP.
The SPs are the sources (originating points) and the sinks (destination points) of signalling traffic.

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17
Q

A STP can be integrated in a SP T/F

A

T

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18
Q

A signalling link consists
1) signalling data link
2) its transfer control functions
3) both

A

both

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19
Q

All the signalling links between two SPs are
combined in a _______
1) signalling link set
2) signalling route set

A

signalling link set

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20
Q

Two different signalling modes used in the signalling networks for CCS7
1) channel associated signaling
2) common channel signaling
3) associated mode
4) quasi-associated mode

A

associated mode and quasi-associated mode

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21
Q

in CCS7, the signalling link and the speech circuit
group run along different routes
1) associated mode
2) quasi-associated mode

A

quasi-associated mode

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22
Q

in CCS7, the signalling link and the speech circuit
group run along same route
1) associated mode
2) quasi-associated mode

A

associated mode

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23
Q

All the signalling routes between two SPs are
combined in a _______
1) signalling link set
2) signalling route set

A

signalling route set

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24
Q

All the signalling links between two ____s are
combined in a signalling link set
1) SP
2) STP

A

SP

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25
Q

The signalling network can be constructed with
1) uniform mode
2) mixed mode
3) either 1 or 2

A

either 1 or 2
uniform mode of signalling (associated or
quasi-associated) or with a mixed mode (associated and quasi-associated)

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26
Q

_________ is used in CCS7 by all user parts (UPs) as a transport system for message exchange
1) UP
2) MTP

A

message transfer part (MTP)

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27
Q

MTP (message transfer part ) includes
1) level1: signalling data link functions
2) level2: signalling link functions
3) level3: signalling network functions
4) all 1 to 3 levels

A

all 1 to 3 levels

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28
Q

?? UP (user part) includes
1) level1
2) level2
3) level3
4) level4

A

level4

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29
Q

UP (user part) includes: choose item(s)
1) ISDN-UP
2) SCCP
3) TUP
4) LSSU

A

1) ISDN-UP
2) SCCP
3) TUP

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30
Q

Level I (Signalling Data Link) can be
1) 64-kbit/s channels
2) 4.8 kbit/s analog channels via modems
3) both

A

both

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31
Q

defines the physical, electrical and functional
characteristics
1) signalling data link
2) signalling link
3) signalling network

A

signalling data link

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32
Q

defines the functions and procedures for a correct exchange of user messages
1) signalling data link
2) signalling link
3) signalling network

A

signalling link

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33
Q

error detection & correction, restoration of fault-free operation are done at
1) signalling data link
2) signalling link
3) signalling network

A

signalling link

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34
Q

________ defines the inter-working of the individual signalling links
1) signalling data link
2) signalling link
3) signalling network

A

signalling network
changeover of signalling links is by signalling network if a faut is detected

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35
Q

directing the messages to the desired signalling line, or to the correct UP
1) signalling data link
2) signalling link
3) signalling network

A

signalling network

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36
Q

changeover of signalling links if a fault is detected and changeback to normal operation after the fault is corrected
1) signalling data link
2) signalling link
3) signalling network

A

signalling network

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37
Q

A Signal Unit (SU) is formed by the functions of
1) level1: signalling data link functions
2) level2: signalling link functions
3) level3: signalling network functions

A

level2: signalling link functions

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38
Q

types of Signal Units (SU)
1) MSU
2) LSSU
3) FISU
4) MSSU

A

1) MSU
2) LSSU
3) FISU

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39
Q

signalling unit MSU stands for

A

Message Signal Units

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40
Q

signalling unit LSSU stands for

A

Link Status Signal Units

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41
Q

signalling unit FISU stands for

A

Fill-in Signal Units

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42
Q

MTP transfers user messages using
1) MSU
2) LSSU
3) FISU

A

MSU: Message Signal Units

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43
Q

MTP transfers messages from UPs (level 4) and
messages from the signalling network management (level 3) using
1) MSU
2) LSSU
3) FISU

A

MSU: Message Signal Units

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44
Q

The __________ contain information for the operation of the signalling link (e.g. of the alignment).
1) MSU
2) LSSU
3) FISU

A

LSSU: Link Status Signal Units

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45
Q

The ______ are used to maintain the acknowledgement cycle when no user messages are to be sent in one of the two directions of the signalling link.
1) MSU
2) LSSU
3) FISU

A

FISU: Fill-in Signal Units

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46
Q

The flag indicating the type of SU
1) CK
2) LI
3) SF

A

Length Indicator (LI)

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47
Q

Be it GSM or CDMA, the connectivity was based on ____ with different application parts (MAP, INAP etc.)
1) Application layer
2) SS7 signalling

A

SS7

48
Q

SSTPs are
1) centralized routing database
2) transmission system for SS7 packet
3) both
4) none

A

1) SSTPs are actually a centralized
routing database and not a transmission system for SS7 packet

49
Q

SSTP stands for

A

Standalone Signal Transfer Point

50
Q

SSTP, DPC stands for

A

Destination Point Codes

51
Q

SSTP, GTT stands for

A

Global Title Translation

52
Q

SSTP makes the routing decision based on things like
1) estination point codes (DPC)
2) global title translation (GTT)
3) routing keys
4) all the above

A

all the above

53
Q

SSTP helps
1) billing to private operators correctly
2) Introduction of new services
3) both

A

both

54
Q

SSTP installation objectives include
1) Regulate, measure, and account for inter-network traffic
2) Optimal expansion of Mobile network of BSNL
3) Offer CCS7 & IP Signaling Services to other Wire line & Wireless Network Operators.
4) To enable migration of TDM based network to IP based network

A

All of these

55
Q

Advantages of SSTP include
1) Most effective method to manage network level resources, features
2) Frees up processing capacity from the switches
3) Can host most of the applications, centrally
4) Enhanced MNP processing capacity

A

All of these

56
Q

Advantages of SSTP include
1) Enhanced MNP processing capacity
2) Optimizes traffic capacity
3) Support for newer protocols SIP/Diameter
4) Works as central command for network growth and maintenance

A

All of these

57
Q

BSNL existing SSTP network comprising of ___ SSTP nodes installed in mated pair configuration
1) 8
2) 16
3) 32
4) 64

A

16

58
Q

The SSTPs at these places shall be with International Signaling Gateway functionality
1) Delhi
2) Mumbai
3) Kolkata
4) Ernakulam

A

1) Delhi
4) Ernakulam
Delhi, Chennai, Pune, & Ernakulam

59
Q

The SSTPs at these places shall be with International Signaling Gateway functionality
1) Pune
2) Bangalore
3) Chennai
4) Kolkata

A

1) Pune
3) Chennai
Delhi, Chennai, Pune, & Ernakulam

60
Q

Each of the TAXs/IP TAXs & MSCs in BSNL Network shall be connected to at
least ______ SSTPs through IP and/or E1 link per SSTP on load balancing and
failover manner
1) two
2) three
3) four

A

two

61
Q

The MSCs in the Indian Telecom Network connected to TAXs/IP TAXs of BSNL Network shall be routed through one of the sixteen ____
1) IMS
2) GMSC
3) MG
4) SSTP

A

SSTPs

62
Q

SSTPs shall be connected with the BSNL’s IP MPLS network through two ________ with minimum two GE interfaces
1) L2 LAN switch
2) L3 LAN switch

A

L3 LAN switch.
The Layer-3 switches shall be deployed in high availability mode (Active-Active) across different arms of each site.

63
Q

SSTPs shall be interconnected with mated SSTP node with _______ through the SDH network of BSNL
1) FE links
2) HSL links
3) 1 or 2

A

3) 1 or 2
FE links /HSL links

64
Q

SSTP NOC locations
1) Hyderabad, Mumbai (DR)
1) Bangalore, Mumbai (DR)
1) Bangalore, Bhopal(DR)
1) Hyderabad, Bhopal(DR)

A

Bangalore, Mumbai (DR)

64
Q

SSTPs shall be connected to the EMS locations on the _________ networks.
1) SDH
2) IP MPLS

A

IP MPLS

65
Q

The CCS Network is comprised of Four Major Components
1) SSP
2) STP
3) SCP
4) _______

A
  • Service Switching Points [SSP]
  • Signaling Transfer Points [STP]
  • a Service Control Points [SCP]
  • Data Signaling Links (SLK)
66
Q

The CCS Network is comprised of Four Major Components
1) SSP
2) STP
3) ____
4) SLK

A
  • Service Switching Points [SSP]
  • Signaling Transfer Points [STP]
  • a Service Control Points [SCP]
  • Data Signaling Links (SLK)
67
Q

The CCS Network is comprised of Four Major Components
1) SSP
2) STP
3) SCP
4) SLK

A
  • Service Switching Points [SSP]
  • Signaling Transfer Points [STP]
  • Service Control Points [SCP]
  • Data Signaling Links (SLK)
68
Q

In CCS Network, SSP stands for

A

Service Switching Points [SSP]

69
Q

In CCS Network, STP stands for

A

Signaling Transfer Points [STP]

70
Q

In CCS Network, SCP stands for

A

Service Control Points [SCP]

71
Q

In CCS Network, SLK stands for

A

Data Signaling Links (SLK)

72
Q

Paired SSTPs are interconnected with _____ links
1) HSL
2) SSL

A

HSL (High Speed Link) - term given for links above 2mbps or 1.5mbps

73
Q

______ is the legacy switches of the telecommunications network
1) SSP
2) STP
3) SCP
4) SLK

A

SSP

74
Q

________is referred to as “Central Office switch”
1) SSP
2) STP
3) SCP
4) SLK

A

Service Switching Points [SSP]

75
Q

________is referred to as “Toll Tandem switch”
1) SSP
2) STP
3) SCP
4) SLK

A

Service Switching Points [SSP]

76
Q

_______are centralized database that provide real-time access to call completion and information services such as Toll-Free Database Service, Alternate Billing Service, local Number Portability.
1) SSP
2) STP
3) SCP
4) SLK

A

Service Control Points [SCP]

77
Q

_____ are packet switches that provide common channel message routing and transport.
1) SSP
2) STP
3) SCP
4) SLK

A

Signaling Transfer Points [STP]

78
Q

_______ are generally deployed in mated-pairs with mirrored databases.
1) SSP
2) STP
3) SCP
4) SLK

A

Signaling Transfer Points [STP]

79
Q

SSTP functions
1) Global Title Translation (IN toll free number translation etc.)
2) SS7 Network Management (rerouting during failure etc.)
3) Gateway Screening (decides forward and discard based on filters)
4) Network Interconnection (connecting to other operators network)

A

All of these

80
Q

SIGTRAN is the name, derived from _________

A

signaling transport

81
Q

The Utstarcom SSTPs incorporated in BSNL are
1. iSG6400
2. C9000
3. B1205
4. B2408

A

iSG6400

82
Q

Utstarcom SSTP supports
1. CAS Signaling
2. RTP
3. DIAMETER & SIP protocol
4. RTP&SIP

A

DIAMETER & SIP protocol
-SIP: Session Initiation Protocol

83
Q

Which performs only the core function of SS7 signalling transfer
1. Integrated STP
2. Standalone STP
3. Both
4. None of the above

A

Standalone STP

84
Q

UTStarcom SSTP iSG6400 signal processing equipment provides _____ signaling messages translation and distribution functionality.
1) SIGTRAN
2) SS7
3) both

A

both

85
Q

SIGTRAN protocol use
1) TCP
2) UDP
3) SCTP
4) STP

A

SCTP: Stream Control Transmission Protocol
- an Internet Protocol (IP) transport
- in the transport layer of the Internet protocol suite

86
Q

________ can convert SS7 to SIGTRAN
1) SG
2) SP
3) STP

A

SG: signalling gateways

87
Q

_______ supports multihoming and redundant paths to increase resilience and reliability
1) TCP
2) UDP
3) SCTP
4) STP

A

SCTP: Stream Control Transmission Protocol

88
Q

Message ordering is available in
1) TCP
2) UDP
3) SCTP
4) STP

A

TCP and SCTP
- message ordering is optional in SCTP; a receiving application may choose to process messages in the order of receipt instead of in the order of sending.

89
Q

A message-based multi-streaming protocol
1) TCP
2) UDP
3) SCTP
4) STP

A

SCTP: Stream Control Transmission Protocol

90
Q

UTStarcom SSTP iSG6400 signal processing equipment SPU supports _____ protocols
1) MTP3
2) SCCP
3) M3UA
4) all the above

A

all the above

91
Q

UTStarcom SSTP iSG6400 signal processing equipment SPU run on
1) active – active load sharing mode
2) active – active load switching mode
3) active – standby load sharing mode
4) active – standby load switching mode

A

active – active load sharing mode

92
Q

UTStarcom SSTP iSG6400: The LSL and HSL links from SSP are duplicated and to be connected to __ ports
1) E1
2) FE
3) STM-1

A

E1
LSL - low speed link
HSL - high speed link

93
Q

Diameter protocol is/are
1) used for AAA functions
2) application layer protocol
3) transport layer protocol

A

1 and 2
used for authentication, authorization, and accounting (AAA)
application layer protocol

94
Q

________ require no routing label
1) MSU
2) LSSU
3) FISU

A

2 and 3
LSSUs and FISUs require no routing label as they are only exchanged between level 2 of
adjacent MTPs

95
Q

Management messages are transferred in MSUs like user messages. T/F

A

True. For discrimination, the management messages have their own SI.

96
Q

_____ forms the interface between these UPs and MTP
1) SCCP
2) TCAP
3) TUP

A

SCCP

97
Q

Select UPs for CCS7 signalling
1) TUP
2) MUP
3) ISDN UP
4) all of these

A

all of these
1) TUP : Telephone User Part
2) MUP: Mobile user Part (by siemens)
3) ISDN UP

98
Q

For Intelligent Network (IN) application ___ and ___ are used
1) INAP
2) TCAP
3) TUP
4) all of these

A

1 and 2
For Intelligent Network (IN) application, Intelligent Application Part (INAP) and TCAP are used

99
Q

In CCS7, SCCP stands for
1) Signalling Control Connection Part
2) Signalling Connection Control Part

A

Signalling Connection Control Part

100
Q

In CCS7, TCAP stands for
1) Transmission Control Application Part
2) Transmission Capabilities Application Part
3) Transaction Control Application Part
4) Transaction Capabilities Application Part

A

Transaction Capabilities Application Part

101
Q

In CCS7, INAP stands for

A

Intelligent Network Application Part

102
Q

________ provides enhanced addressing capability to MTP to enable it to address messages with Global Title (GT).
1) SCCP
2) TCAP
3) TUP

A

SCCP: Signalling Connection Control Part

103
Q

The ____and the _____together is also referred to as
Network Service Part (NSP)
1) TCAP, SSCP
2) TCAP, MTP
3) MTP, SCCP

A

MTP and the SCCP

104
Q

The SS#7 signalling method identifies the destination and origination using
1) signalling node codes
2) signalling point codes
3) signalling node IDs
4) signalling point IDs

A

signalling point codes (SPC)
- it has only fourteen bits
- always combined with a Network indicator

105
Q

Signalling point codes (SPC)
1) has only fourteen bits
2) always combined with a Network indicator
3) a code is only valid in one particular network
4) uniquely addressed on a global scale

A

1,2,3
It is too small to be uniquely addressed on a global scale. Hence combined with a Network indicator.

106
Q

Global title is sent in the ____ message in SS#7 messages
1) SCCP
2) TCAP
3) TUP

A

SCCP: Signalling Connection Control Part
Global title translation must be performed at each relevant network gateway

107
Q

Global title translation must be performed at each relevant network gateway T/F

A

T
SPCs are only ever valid in individual networks, so Global title translation must be performed at each relevant network gateway to get SPC for the network
SPC: signalling point code

108
Q

Global title translation is always used if no SPC for the destination is available at all. T/F

A

T
For example, the HLR is to be identified on the basis of the IMSI.

109
Q

Signalling Connection Control Part (SCCP) supports
1) Connection-oriented services
2) Connectionless services

A

both

110
Q

______ portion of the CCS#7 protocol is used to transfer non-circuit related information between
two signalling points in the network.
1) SCCP
2) TCAP
3) TUP

A

TCAP: Transaction Capabilities Application Part
- using the SCCP connectionless service

111
Q

______ carries Mobile Application Part (MAP) messages sent between mobile switches and databases to support user authentication, equipment identification,
and roaming.
1) SCCP
2) TCAP
3) TUP

A

TCAP: Transaction Capabilities Application Part

112
Q

______ is used to report the location of a mobile network subscriber to the home exchanges.
1) SCCP
2) TCAP
3) TUP

A

TCAP: Transaction Capabilities Application Part

113
Q

In credit card service to check the validity and to execute account transactions.
1) SCCP
2) TCAP
3) TUP

A

TCAP: Transaction Capabilities Application Part

114
Q

SCCP services are
1) connection oriented
2) connectionless
3) both

A

both
Basic connectionless
Sequenced connectionless
Basic connection oriented
Flow control connection oriented

115
Q

SCCP protocol class 0 is
1) Basic connectionless
2) Sequenced connectionless
3) Basic connection oriented
4) Flow control connection oriented

A

Basic connectionless

116
Q

SCCP protocol class 3 is
1) Flow control connection oriented
2) Sequenced connection oriented
3) Basic connection oriented

A

Flow control connection oriented

LDCE Wireline (5 decks)

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