S. No. Name Test/Lab Onsite date 4 Bardeep Kaur Test N/A 6 Anuj Madan Test N/A 8 Ruhi Pathak Test N/A 15 Atul Barthwal Test N/A 17 Pallawi Sharma Test N/A 18 Deepti Chugh Test N/A 19 Shama Arora Test N/A 20 Rajeev Lochan Das Test N/A 24 Vipin K. Rai Test N/A 28 Yogesh Kaushal Test N/A 29 Anand Krishan Khullar Test N/A 30 Pardeep Khasa Test N/A 32 Saatwik Awasthi Test N/A 36 Amrita Ambastha Test N/A 37 Saurabh Singh Test N/A 38 Harshvardhan shukla Test N/A
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S. No. Name Test/Lab Onsite date4 Bardeep Kaur Test N/A6 Anuj Madan Test N/A8 Ruhi Pathak Test N/A15 Atul Barthwal Test N/A17 Pallawi Sharma Test N/A18 Deepti Chugh Test N/A19 Shama Arora Test N/A20 Rajeev Lochan Das Test N/A24 Vipin K. Rai Test N/A28 Yogesh Kaushal Test N/A29 Anand Krishan Khullar Test N/A30 Pardeep Khasa Test N/A32 Saatwik Awasthi Test N/A36 Amrita Ambastha Test N/A37 Saurabh Singh Test N/A38 Harshvardhan shukla Test N/A
Question and AnswersQ Why is SS7 called "SS7"? The previous system was #6Q What is SS7 used for in telecommunications networks? Signalling Protocol used in telecommunication networkQ What do the term SP, SSP and STP stand for in SS7 terminology? Signalling Point, Signalling Switching Point, Signaling Transfer PointQ State the maximum and minimum number of links in a Link Set. Max 16 Min 1Q State the purpose of a Point Code (PC)? To unambiguously identify a node in an SS7 network.Q What is the SI value for SCCP. 3Q What is GTT Global Title Translation.Q What is the meaning of the acronym ISUP? ISDN User Part.Q Which of these is NOT an SS7 node HLR, VLR, AUC, SSP, SCP, SE SE: Subscriber Equipment : Mobile Phone or Landline telephone or ISDN CPE Q: State the function of an SSP and what is its commonly accepted symbol. Originates or Terminates the SS7 signaling transaction. Comman Symbol is a Circle.Q: State the function of an STP and what is its commonly accepted symbol. Transfers(routes) SS7 messages between SPs(Postman). Square with a diagonal.Q: What is a Linkset? A number of SS7 link(s) directly connecting two points.Can be managed as an entityQ: What is the most common way (link category) to transport an SS7 link? Channalized 2mbps or 1.5 Mbps(MTP 1)Q: How the various signalling units are identified IN ss7? LIQ: What Fields in SS7 Frame are common for FISU, LSSU and MSU? FLAG, CK, LI, FSN, FIB, BSN, BIB.Q: What determines that the user part is SCCP? SI valueof SIOQ: What is the main use of SCCP ? Act as a transport for application and act as application itself in case of SCCP Management
Q: What do we call a GTT when MSU has RI=GT _________________ and RI=SSN ______________________. Intermediate and Final GTQ: What is intermediate GTT The next node will do further GT so as to help message reach the final destination.Q: What is Final GTT The Translated node is the final node. Usually it is the Dabatabe(HLR) in the live network.Q: What is the purpose of the SSN (subsystem number) within SCCP? Tells SCCP which user part or which application part will receive the dataQ: What, generally, is the first ISUP message in a signalling sequence? IAM ( Initial address message )Q: SS-7 Over IP is better known as, SIGTRANQ: In which unit the traffic is measured. erlang (measure link occupancy)Q: What is the unique identity of an SS7 Link withing a linkset SLCQ: What is CAS? Channel Associated Signalling
Q: What is CCS? Common Channel SignallingQ: Which regulatory body decides the point codes in International Domain ITU-TSQ: An SS7 Link connecting Mated STPs is a _____ Link CQ: An SS7 Link connecting STP and SSP/SCP is a _____ Link AQ: What is an "F" Link?
Q: What is meant by associated mode of operation with respect to SS7 Link? Signalling links are effectively in parallel with speech circuitsQ: What is meant by non-associated mode of operation with respect to SS7 Link? Links are not in parallel with circuits and signalling passes through one or more STPs.Q: What is meant by quazi-associated mode of operation with respect to SS7 Link? Links are not in parallel with circuits and signalling passes through optimized Path.Q: What is the purpose of the FISU? Sent when no MSUs are available for healthcheck. Also used to acknowledge MSUs.Q: FIB, BIB, FSN and BSN are used for the ____________& ___________ mechanism by SS7. Error Detection and CorrectionQ: What is the purpose of the LSSU? To indicate the status of the link or the nodes ( Message is SIPO) at each end.Q: Which parameter of LSSU differentiates it from FISU and MSU? Status Field(SF)Q: Name a technique used for error detection and correction in SS7. Basic Error Control and Preventive Cyclic Retransmission.Q: What are the broad level functionality of MTP 3? 1) Signalling Network Management-TM, RM, LM, 2) Signalling Message handling-DF, RF, DFQ: Routing Label is a part of which field ? SIF(MSU)Q: What is the maximum packet size in SS7 ? 279 Octets.Q: What is MGT Mobile Global Title (the e214 address)
Translation, it is generically called GT, though GTT is actually for e214 tranlation of SCCP CDPAQ: How many SSNs are there. 256Q: Briefly explain the purpose of ISUP Used to send / receive messages related to call setup, supervision and release.
Q: In ISUP Call the trunk or circuit to be used for call is uniquely identified by ______ , ______ and _________. OPC, DPC and CICQ: What is the benchmark threshold value of link occupancy? 0.4 erlQ: Calculate the number of messages that a link will support. (Link Capacity) Given the following70Q: (Link Utilization) Calculate the percentage utilization of the link. Given the following0.024Q: Can we have CAS signalling over CCS? Yes….by configuring the SS7 on each E1 and difining the type as CAS (CCS allows this config).
The SS7 link type, meaning "Fully Associated" the link between SSP and SSP/SCP (No STP).. Were used in legacy networks.
Q: Process,when the Digits from incoming MSU or other information in the mesaage are used by STP to identify the actual node to which this MSU is actually destined for is called _________
Bit Stuffing.
One's Density ViolationQ: The procedure SS7 traffic management takes if an SS7 link fails. Changeover procedure diverts traffic from the failed link to the others in the same link set.
TFP, Adjecent, RST, TFA, TFPQ: What is the difference between SIN and SIE?
Q: What does the Acronym AERM and SUERM stand for.
Q: What does Q2 of ITU-T referes? MTP3 Test SpecificationsQ: A point code 2057 in decimal network is equivelent to __________ in international network,
Q: The process of adding a vit "1" after every consecutive fibe "1"s by MTP2, while transmitting an SS7 message is called _____________
Q: The condition, when receiving MTP2 finds that the pact has 6 consecutive "1"s is called _________________________
Q: When any SP fails, adjecent STP broadcast _______ messages to _______ nodes. Then these nodes interrogates with STP about access to SP failed by sending _________ message and if the destination is available STP returns a ________ and if inaccessible , STP return __________.
SIN-- Normal Alignment, when there are more than one links in a linkset. Not all the links are down. Alignment timer has a higher value.SIE-- Emergency Alignment, where none of the link(s) in a linkset is Active. Alignment has a lower value.
SUERM-- Signalling Unit Error rate Monitor (64 error will take OOS and every 256 correct MSUs shall decrement is by1), AERM-- Alignment Error Rate Monitor (used during Alignment phase, more than 4 errors make link OOS).
They are not at all co-related. Decimal is only a format of representing a point code a 2-2-2 point code with NAI National is same as 2057 Decimal PC with NAI national. But a 2-2-2 PC with NAI International is not same as 2057 in National
