Signalling Unit Types and Functions
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Questions and Answers

What is the function of Message Signal Units (MSU) in the MTP?

  • Containing information for signalling link operation
  • Transferring user messages (correct)
  • Used for alignment purposes
  • Maintaining acknowledgement cycle

    • What type of information do Link Status Signal Units (LSSU) contain?

  • Signalling network management messages
  • User messages
  • Acknowledgement cycle
  • Alignment information (correct)

    • What is the primary purpose of Fill-in Signal Units (FISU)?

  • Aligning the signalling link
  • Transferring user messages
  • Maintaining acknowledgement cycle when no user messages are sent (correct)
  • Maintaining acknowledgement cycle

    • What is the purpose of the Backward Sequence Number (BSN)?

    <p>Error control acknowledgement carrier</p> Signup and view all the answers

    What is the bit pattern of a flag used in the SUs?

    <p>01111110</p> Signup and view all the answers

    How are consecutive flags used in the event of overloading in the signalling link?

    <p>For alignment purposes</p> Signup and view all the answers

    What is the purpose of a signalling route in the context of the text?

    <p>To define the communication path between two SPs</p> Signup and view all the answers

    How are signalling routes handled between two Service Providers (SPs)?

    <p>Distributed over several different routes</p> Signup and view all the answers

    What is the significance of the two levels in the worldwide signalling network?

    <p>They are functionally independent of each other</p> Signup and view all the answers

    What does the Message Transfer Part (MTP) represent in CCS7?

    <p>User-neutral means of message transport</p> Signup and view all the answers

    How does a mixed mode signalling network differ from a uniform mode signalling network?

    <p>It combines associated and quasi-associated modes</p> Signup and view all the answers

    What describes each user part within CCS7?

    <p>Contains functions, protocols, and coding for specific user types</p> Signup and view all the answers

    What is the prime function of SIP protocol in the Next Generation Network?

    <p>Establish and manage multimedia sessions over IP networks</p> Signup and view all the answers

    Which layer in the SIGTRAN protocol stack provides the real-time reliable transmission service required by SCN Signaling?

    <p>Signaling transmission layer</p> Signup and view all the answers

    What is the role of the Media Gateway Controller (MGC) in the Signaling transmission function model?

    <p>Controls the trunk based on instructions from MGC</p> Signup and view all the answers

    In the SIGTRAN protocol, which layer provides the standard primary language interface with SCN Signaling?

    <p>Signaling adaptation layer</p> Signup and view all the answers

    Which protocol has been chosen as the session control protocol for the Next Generation Network?

    <p>SIP</p> Signup and view all the answers

    What does SIGTRAN stand for in the context of telecommunications?

    <p>Signaling Transport</p> Signup and view all the answers

    What functionality do the LMG's in BSNL provide?

    <p>Voice and internet services</p> Signup and view all the answers

    What is the difference in capacity between UTStarcom LMG B1205 and B1205E?

    <p>B1205 has a capacity of 256 lines, B1205E has a capacity of 512 lines</p> Signup and view all the answers

    How is the ratio of voice line cards to ADSL cards in UTStarcom LMGs?

    <p>4:1</p> Signup and view all the answers

    What type of services does the UA5000 Universal Access Unit by Huawei provide access to?

    <p>Narrowband and broadband services</p> Signup and view all the answers

    In BSNL, which equipment is provided for PRI/BRI facility?

    <p>IAG equipment</p> Signup and view all the answers

    What is the purpose of the UA5000 Universal Access Unit in the context of telecom services?

    <p>Accessing large-capacity, high-rate integrated services</p> Signup and view all the answers

    What is one of the features of signaling in PSTN mentioned in the text?

    <p>High performance and flexibility</p> Signup and view all the answers

    How are the signaling messages transmitted in CCS7?

    <p>Via separate signaling links</p> Signup and view all the answers

    What is the typical transfer rate used in digital networks according to the text?

    <p>64 Kbit/s</p> Signup and view all the answers

    Why are signaling links always available even during existing calls?

    <p>For automatic supervision and control of the signaling network</p> Signup and view all the answers

    What is one purpose of the CCS7 signaling links?

    <p>Connecting signaling points in a communication network</p> Signup and view all the answers

    Which type of media can be used for signaling according to the text?

    <p>Cable (copper, optical fiber)</p> Signup and view all the answers

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