103.217.167.137 (talk) Typo. FTTC uses ‘curb’ not kerb. Tags: Mobile edit Mobile web edit |
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{{main|National Broadband Network}} |
{{main|National Broadband Network}} |
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A '''Network Termination Device''' (NTD) is a customer-side [[network interface device]] used by the Australian [[National Broadband Network]] |
A '''Network Termination Device''' (NTD) is a customer-side [[network interface device]] used by the Australian [[National Broadband Network]] (NBN). Network termination devices provide multiple [[bridging (networking)|bridge]]s for customers to access the NBN. There are different types of NTDs for the various connection technologies encompassed by NBN. All connection types except FTTN use NTDs on premises. Depending on the kind of link, NTDs typically provide two telephony and four data channels.<ref>{{cite web |title=Residential preparation and installation: Single Dwelling Units (SDUs) and Multi Dwelling Units (MDUs) |url=https://www.nbnco.com.au/content/dam/nbnco/documents/preparation-and-installation-guide-for-sdus-and-mdus.pdf |date=12 December 2016 |publisher=[[NBN Co]] |access-date=21 August 2019}}</ref> An external power source is required, and an [[uninterruptible power supply]] (UPS) can be used to maintain connection in power outages (battery backups are available for the FTTP NTD). FTTC requires power to be provided from the premises to the kerb (distribution point). |
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NTDs provide [[user–network interface]] (UNI) connections for connection of in-premises devices. They typically have multiple [[Registered jack#RJ45|RJ45 jacks]] for the '''UNI-D''' (data) connection, and some models have [[Registered jack#RJ11|RJ11 jacks]] for the '''UNI-V''' (voice) connection. All NTDs are capable of passing [[Voice over IP|VoIP]] traffic. FTTN requires premises to have a compatible VDSL2 modem. Each UNI-D port can be activated by retail service providers for a different NBN services. The NTD cannot be used as a [[Network layer|Layer 3]] router for in-premises networking.<ref>{{cite web |url=https://www.nbnco.com.au/residential/learn/network-technology/fibre-to-the-curb-explained-fttc |title=nbn Fibre to the Curb explained |publisher=NBN Co |access-date=21 August 2019}}</ref> |
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Technicians sometimes refer to NTDs for fixed wireless as [[Indoor unit|IDU]] (Indoor Unit) in contrast with the antenna, which is called an Outdoor Unit (ODU). The User Guide for NBN Fixed Wireless Connection refers to the devices as the NBN Connection Box and NBN Outdoor Antenna, respectively. |
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==Network technologies== |
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All but FTTN and FTTC use a NTD on premises. An external power source is required to power the NTD. A [[uninterruptible power supply]] (UPS) can be used to power the NTD to maintain connection to the telecommunications network in case of an electrical power outage, with a backup battery available for the FTTP NTD, |
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{{see also|National Broadband Network#NBN Technologies}} |
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All technologies except Fibre To The Node (FTTN) and Fibre to the Curb (FTTC, previously called Fibre to the distribution point (FTTdp)) provide [[User–network interface|User Network Interface]] (UNI) jacks ([[Modular connector|modular jacks]] for data (UNI-D, RJ45)) in premises. FTTN and FTTC each require premises to have a compatible VDSL2 modem. FTTC requires power to be provided from the premises to the curb (distribution point). |
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Each UNI-D port can be activated by the retail service provider for a different NBN service. The NTD cannot be used as a router for in premises networking. If only one data connection is required it can be achieved through the active NTD UNI-D jack. |
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==Glossary== |
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UNI-D: User Network Interface-Data<br/> |
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UNI-V: User Network Interface-Voice |
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{| class="wikitable sortable" |
{| class="wikitable sortable" |
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|+ Comparison of NTDs for different network technologies |
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|+ Network Termination Device (NTD) |
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|- |
|- |
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! scope="col" | Technology |
! scope="col" | Technology |
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! scope="col" | |
! scope="col" | Model |
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! scope="col" | |
! scope="col" | Upstream protocol |
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! scope="col" | UNI-V jacks |
! scope="col" | UNI-V jacks |
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! scope="col" | UNI-D jacks |
! scope="col" | UNI-D jacks |
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! scope="col" | |
! scope="col" style="width: 20%;" | Alternative names |
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! scope="col" |
! scope="col" style="width: 40%;" | Notes |
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! scope="col" | Notes |
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|- |
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| FTTP || |
| FTTP || Alcatel-Lucent || [[GPON]] || 2 || 4|| || |
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| FTTN || |
| FTTN || None (end-user modem) || [[Very-high-bit-rate digital subscriber line|VDSL2]] || 1 || 0|| || May have a [[600 series connector|600 series]] plug in place of UNI-V |
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|- |
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| FTTC || NetComm NDD-0300<ref>[https://www.zdnet.com/article/netcomm-wireless-unveils-fttc-network-connection-device/ Corinne Reichert, (4 December 2017), NetComm Wireless unveils FttC network connection device, ZDNet]</ref> || VDSL2 || 0 || 1 || ''Network connection device'' (NCD) or ''FTTC connection device''<ref>{{cite web |url=https://community.tpg.com.au/t5/NBN-Installation/quot-FTTC-Connection-Device-quot-fancy-way-of-saying-quot/td-p/17985 |title="FTTC Connection Device" = fancy way of saying "Standalone VDSL2 modem"? |website=TPG Community |date=September 2018 |access-date=21 August 2019}}</ref>. FTTC was previously known as ''fibre to the distribution point'' (FTTdp).|| |
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| FTTC || NBN Co || VDSL2+ or [[G.fast]] || 1 || 1|| no || yes || |
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* May have 600 series plug in place of UNI-V |
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previously FTTdp<br> |
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* A ''distribution point unit'' (DPU) is located near the property boundary inside a pit on the street and can service up to 4 connections. |
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Netcomm Wireless NDD-0300 Rev: 02<ref>[https://www.zdnet.com/article/netcomm-wireless-unveils-fttc-network-connection-device/ Corinne Reichert, (4 December 2017), NetComm Wireless unveils FttC network connection device, ZDNet]</ref><br> |
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* The DPU is powered from the mains-powered NTD at each premises (NTD provides 60V DC){{cn|date=August 2019}} |
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Power supplied from end user premises to Distribution Point Unit at kerb. Input 200-250 50/60 Hz/460mA Output DC 60V/350mA |
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|- |
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| HFC || |
| HFC || Arris CM8200(B) || [[DOCSIS 3.0]] || 0 || 2 || || Typically only one UNI-D port (UNI-D 1) is used |
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|- |
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| Fixed wireless || |
| Fixed wireless || Alcatel-Lucent || [[LTE (telecommunication)|LTE]] || 0 || 4 || ''NBN connection box'' or ''indoor unit'' (IDU) || Where a [[plain old telephone service]] (POTS) is in place, this can be kept |
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|- |
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| Satellite || |
| Satellite || Alcatel-Lucent || || 0 || 4|| ''Indoor unit'' (IDU) || |
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*Where a POTS connection is in place, this can be kept |
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*Part of the [[very small aperture terminal]] (VSAT) system<ref>{{cite web |url=https://www.nbnco.com.au/content/dam/nbnco2/documents/network-design-rules.pdf |page=49 |title=Network Design Rules |date=29 June 2018 |publisher=NBN Co. |access-date=21 August 2019}}</ref> |
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==Gallery== |
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{{Gallery |
{{Gallery |
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⚫ | |||
|title= NBN Network Termination Devices |
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|width= | height= |
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⚫ | |||
|footer= |
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|File:NTD cover removed.jpg |
|File:NTD cover removed.jpg |
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|alt1= |
|alt1=Fibre NTD with cover removed |
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|FTTP NTD |
|FTTP NTD (cover removed), showing [[Ethernet]], power and fibre connections |
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|File:Fixed-wireless-NTD.jpeg |
|File:Fixed-wireless-NTD.jpeg |
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|alt2=Fixed wireless |
|alt2=Fixed wireless NTD |
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|Fixed wireless NTD |
|Fixed wireless NTD |
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|File:NBN-Fixed-Wireless-ODU.jpg |
|File:NBN-Fixed-Wireless-ODU.jpg |
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|alt3=Fixed wireless |
|alt3=Fixed wireless ODU antenna |
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|Fixed wireless ODU ( |
|Fixed wireless outdoor unit (ODU) antenna (not strictly an NTD) |
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|File:NTD-Satellite.jpeg |
|File:NTD-Satellite.jpeg |
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|alt4=Satellite NTD |
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|alt4=Network Termination Device for satellite |
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|Satellite NTD |
|Satellite NTD |
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}} |
}} |
Revision as of 08:42, 21 August 2019
A Network Termination Device (NTD) is a customer-side network interface device used by the Australian National Broadband Network (NBN). Network termination devices provide multiple bridges for customers to access the NBN. There are different types of NTDs for the various connection technologies encompassed by NBN. All connection types except FTTN use NTDs on premises. Depending on the kind of link, NTDs typically provide two telephony and four data channels.[1] An external power source is required, and an uninterruptible power supply (UPS) can be used to maintain connection in power outages (battery backups are available for the FTTP NTD). FTTC requires power to be provided from the premises to the kerb (distribution point).
NTDs provide user–network interface (UNI) connections for connection of in-premises devices. They typically have multiple RJ45 jacks for the UNI-D (data) connection, and some models have RJ11 jacks for the UNI-V (voice) connection. All NTDs are capable of passing VoIP traffic. FTTN requires premises to have a compatible VDSL2 modem. Each UNI-D port can be activated by retail service providers for a different NBN services. The NTD cannot be used as a Layer 3 router for in-premises networking.[2]
Network technologies
Technology | Model | Upstream protocol | UNI-V jacks | UNI-D jacks | Alternative names | Notes |
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FTTP | Alcatel-Lucent | GPON | 2 | 4 | ||
FTTN | None (end-user modem) | VDSL2 | 1 | 0 | May have a 600 series plug in place of UNI-V | |
FTTC | NetComm NDD-0300[3] | VDSL2 | 0 | 1 | Network connection device (NCD) or FTTC connection device[4]. FTTC was previously known as fibre to the distribution point (FTTdp). |
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HFC | Arris CM8200(B) | DOCSIS 3.0 | 0 | 2 | Typically only one UNI-D port (UNI-D 1) is used | |
Fixed wireless | Alcatel-Lucent | LTE | 0 | 4 | NBN connection box or indoor unit (IDU) | Where a plain old telephone service (POTS) is in place, this can be kept |
Satellite | Alcatel-Lucent | 0 | 4 | Indoor unit (IDU) |
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Gallery
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FTTP NTD (cover removed), showing Ethernet, power and fibre connections
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Fixed wireless NTD
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Fixed wireless outdoor unit (ODU) antenna (not strictly an NTD)
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Satellite NTD
References
- ^ "Residential preparation and installation: Single Dwelling Units (SDUs) and Multi Dwelling Units (MDUs)" (PDF). NBN Co. 12 December 2016. Retrieved 21 August 2019.
- ^ "nbn Fibre to the Curb explained". NBN Co. Retrieved 21 August 2019.
- ^ Corinne Reichert, (4 December 2017), NetComm Wireless unveils FttC network connection device, ZDNet
- ^ ""FTTC Connection Device" = fancy way of saying "Standalone VDSL2 modem"?". TPG Community. September 2018. Retrieved 21 August 2019.
- ^ "Network Design Rules" (PDF). NBN Co. 29 June 2018. p. 49. Retrieved 21 August 2019.