1 Pertemuan 11 Broadband Management Matakuliah: H0372/Manajemen Jaringan Tahun: 2005 Versi: 1/0.

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Presentation transcript:

1 Pertemuan 11 Broadband Management Matakuliah: H0372/Manajemen Jaringan Tahun: 2005 Versi: 1/0

2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menunjukkan bagaimana broadband management dilakukan

3 Outline Materi DSL HFC

4 Broadband Access Networks Cable Modem Network HFC Cable Modem XDSL Mode m Telephone Loop CM Head End Central Office DSL Network

5 Access Technologies Broadband Access Technology xDSLWireless HFC HDSLADSLVDSL Telephony- Return Two- Way MMDSISMLMDS Satellite Communication Telephony- Return Two- Way One- Way Two- Way

6 Cable Modem HFC uses tree topology Downstream in broadcast mode Upstream transmission by cable modem coordinated by head end Data over cable service specifications (DOCSIS) for cable modem ensures interoperability One-way cable modem uses telco-return

7 Cable Modem Termination System Equipment at the head end All cable modems terminated on the head end Gateway to the external network Multiplexes and demultiplexes signals Frequency converts upstream to downstream signals Can be designed either as a bridge or router

8 Three groups of interfaces: Data interfaces Cable modem to CPE (1) CMTS-NSI (2) Operations support systems and telco-return OSS (3) Telco-return (4) RF and security DOCS security system (5) RF interface (6) CMTS Components

9 HFC Management Challenges More complex than either computer network or telecommunication network Involves both physical and data layers Multiple physical facilities Legacy cable system Multimedia service RF spectrum management Service and business management important for MSOs and customer Shared media impacts security and bandwidth Security and privacy of home network

10 HFC / CM Management Cable modem management CMTS management HFC link management RF spectrum management

11 CM Management MIBs docsDev (69)system (1) mib-2 (internet.2.1) transmission (10)interfaces (2) ifMIB (31) docsIfMib (127)docsTrCmMIB (128)

12 CM Management MIBs Three categories of MIBs Standard MIBs: system, interfaces, ifMIB CM and CMTS interfaces docIfMIB.. RF Interfaces in CM and CMTS, base line privacy and QoS docsTrCmMIB.. telephony-return interface CM and CMTS objects docsDevMIB

13 DSL Access Technology Why is DSL attractive? Shannon limit of data rate is 30,000 bps (3-KHz, 30 dB S/N channel) Digital transmission over loop (DSL) improves data rate T1/DS1 (1.544Mbps)18,000 feet T2/DS2 (6.312 Mbps)12,000 feet

14 DSL Limitations Loop conditions with no direct copper to the house Loaded coils in loop (used to increase analog distance) cannot carry digital signal Modern subdivisions have fiber to the neighborhood or curb with digital mux Operating company inventory dated (administrative issue)

15 ADSL Network ADSL.. Asymmetric Digital Subscriber Line ATU-C ADSL transmission unit - central office ATU-C ADSL transmission unit - remote/residence Splitter separates voice and data ATU-C Broadband Network Splitter ATU-R ADSL Loop Voice