Signalling, SSTP, SIGTRAN, SIP, MEGACO Flashcards
Ring back, tone and ringing current are always transmitted from
1) calling subscriber exchange
2) called subscriber exchange
called subscriber exchange
busy tone and recorded announcements are always transmitted from
1) calling subscriber exchange
2) called subscriber exchange
calling subscriber exchange
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
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
?? 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
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)
________ 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.
Release signal is normally of more than _____ milliseconds duration
1) 100
2) 200
3) 500
500
Calling Subscriber Line Signaling
1) Answer Signal
2) Answer Back Signal
3) Ringing Signal
4) Register Recall Signal
Answer Back Signal
Called Subscriber Line Signaling
1) Address signal
2) Answer Back Signal
3) Permanent Line (PG) Signal
4) Register Recall Signal
Register Recall Signal
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
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
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
Register Recall Signal
The two type of digital inter-exchange signaling are
(w.r.t channels)
channel associated signaling
and common channel signaling
per-trunk signalling is
1) channel associated signaling
2) common channel signaling
channel associated signaling
____ are generally exchanges
1) SP
2) STP
SP.
The SPs are the sources (originating points) and the sinks (destination points) of signalling traffic.
A STP can be integrated in a SP T/F
T
A signalling link consists
1) signalling data link
2) its transfer control functions
3) both
both
All the signalling links between two SPs are
combined in a _______
1) signalling link set
2) signalling route set
signalling link set
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
in CCS7, the signalling link and the speech circuit
group run along different routes
1) associated mode
2) quasi-associated mode
quasi-associated mode
in CCS7, the signalling link and the speech circuit
group run along same route
1) associated mode
2) quasi-associated mode
associated mode
All the signalling routes between two SPs are
combined in a _______
1) signalling link set
2) signalling route set
signalling route set
All the signalling links between two ____s are
combined in a signalling link set
1) SP
2) STP
SP
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
16
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
