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Pertemuan 18 Serial Point-to-Point Links

Pertemuan 18 Serial Point-to-Point Links. Discussion Topics. Introduction to serial communication Time-division multiplexing Demarcation point DTE-DCE HDLC encapsulation Configuring HDLC encapsulation Troubleshooting a serial interface. Introduction to Serial Communication.

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Pertemuan 18 Serial Point-to-Point Links

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  1. Pertemuan 18Serial Point-to-Point Links

  2. Discussion Topics • Introduction to serial communication • Time-division multiplexing • Demarcation point • DTE-DCE • HDLC encapsulation • Configuring HDLC encapsulation • Troubleshooting a serial interface

  3. Introduction to Serial Communication Transmission system encodes bits into electrical voltage using methods like NRZ-L or AMI Some of the many serial communications standards include the following: RS-232-EV.35High-Speed Serial Interface (HSSI)

  4. Time-Division Multiplexing

  5. Demarcation Point The point in the network where the responsibility of the service provider or "telco" ends.

  6. DTE-DCE

  7. Serial Connection Options

  8. DTE/DCE Interface • The DTE/DCE interface for a particular standard defines the following specifications: • Mechanical/physical - Number of pins and connector type • Electrical - Defines voltage levels for 0 and 1 • Functional - Specifies the functions that are performed by assigning meanings to each of the signaling lines in the interface • Procedural - Specifies the sequence of events for transmitting data

  9. HDLC Encapsulation

  10. Configuring HDLC Encapsulation

  11. Troubleshooting a Serial Interface

  12. Troubleshooting a Serial Interface • Five possible problem states can be identified in the interface status line of the show interface serial display: • Serial x is down, line protocol is down. • Serial x is up, line protocol is down. • Serial x is up, line protocol is up (looped). • Serial x is up, line protocol is down (disabled). • Serial x is administratively down, line protocol is down.

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