Signalling, SSTP, SIGTRAN, SIP, MEGACO Flashcards by Prabhash K P

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

called subscriber exchange

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

calling subscriber exchange

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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

Answer Back Signal

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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

Answer Back Signal

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?? 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

Answer Back Signal

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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

Permanent line or permanent glow (PG)

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________ 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

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

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

500

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

Answer Back Signal

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

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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

Answer Signal

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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

Answer Signal

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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

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

channel associated signaling
and common channel signaling

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

channel associated signaling

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____ are generally exchanges
1) SP
2) STP

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

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A STP can be integrated in a SP T/F

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

both

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

signalling link set

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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

associated mode and quasi-associated mode

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

quasi-associated mode

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

associated mode

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

signalling route set

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

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

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

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

message transfer part (MTP)

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

all 1 to 3 levels

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

level4

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

1) ISDN-UP 2) SCCP 3) TUP

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

both

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

signalling data link

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

signalling link

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

signalling link

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

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

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

signalling network

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

signalling network

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

level2: signalling link functions

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

1) MSU 2) LSSU 3) FISU

signalling unit MSU stands for

Message Signal Units

signalling unit LSSU stands for

Link Status Signal Units

signalling unit FISU stands for

Fill-in Signal Units

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

MSU: Message Signal Units

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

MSU: Message Signal Units

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

LSSU: Link Status Signal Units

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

FISU: Fill-in Signal Units

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

Length Indicator (LI)

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

SS7

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

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

SSTP stands for

Standalone Signal Transfer Point

SSTP, DPC stands for

Destination Point Codes

SSTP, GTT stands for

Global Title Translation

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

all the above

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

both

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

All of these

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

All of these

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

All of these

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

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

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

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

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

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

two

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

SSTPs

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

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

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

3) 1 or 2 FE links /HSL links

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

Bangalore, Mumbai (DR)

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

IP MPLS

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

- Service Switching Points [SSP] - Signaling Transfer Points [STP] - a Service Control Points [SCP] - Data Signaling Links (SLK)

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

- Service Switching Points [SSP] - Signaling Transfer Points [STP] - a Service Control Points [SCP] - Data Signaling Links (SLK)

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

- Service Switching Points [SSP] - Signaling Transfer Points [STP] - Service Control Points [SCP] - Data Signaling Links (SLK)

In CCS Network, SSP stands for

Service Switching Points [SSP]

In CCS Network, STP stands for

Signaling Transfer Points [STP]

In CCS Network, SCP stands for

Service Control Points [SCP]

In CCS Network, SLK stands for

Data Signaling Links (SLK)

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

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

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

SSP

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

Service Switching Points [SSP]

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

Service Switching Points [SSP]

_______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

Service Control Points [SCP]

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

Signaling Transfer Points [STP]

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

Signaling Transfer Points [STP]

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)

All of these

SIGTRAN is the name, derived from _________

signaling transport

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

iSG6400

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

DIAMETER & SIP protocol -SIP: Session Initiation Protocol

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

Standalone STP

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

both

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

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

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

SG: signalling gateways

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

SCTP: Stream Control Transmission Protocol

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

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.

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

SCTP: Stream Control Transmission Protocol

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

all the above

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

active – active load sharing mode

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

E1 LSL - low speed link HSL - high speed link

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

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

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

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

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

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

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

SCCP

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

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

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

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

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

Signalling Connection Control Part

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

Transaction Capabilities Application Part

In CCS7, INAP stands for

Intelligent Network Application Part

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

SCCP: Signalling Connection Control Part

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

MTP and the SCCP

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

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

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

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

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

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

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

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

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

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

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

both

______ 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

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

______ 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

TCAP: Transaction Capabilities Application Part

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

TCAP: Transaction Capabilities Application Part

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

TCAP: Transaction Capabilities Application Part

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

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

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

Basic connectionless

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

Flow control connection oriented

Signalling, SSTP, SIGTRAN, SIP, MEGACO Flashcards

(117 cards)