Download - Pon po tm_ae

Splitter Port Loss

1 8 d B 6 4

1 2 8 2 1 d B

3 2 1 5 d B

8 9 d B

4 6 d B

2 3 d B

I n s e r t i o n l o s s N u m b e r o f p o r t s

T y p i c a l loss = 10 log (1/nb ports)

6 1 2 d B

Note: Cascaded splitters always induce a higher loss than a single splitter (for the same split ratio)

O p t i c a l S p l i t t e r

I n p u t

O u t p u t s

O 2

O 3

I 1

Understanding Passive Optical Network Testing

Construction/Acceptance Testing Fiber under Test

Patch Cord

Copper

Acceptance testing with Loss test set/ORL meter• Connectorized splitter: Link IL and ORL of the feeder part at 1310/1550 nm Link IL and ORL of the distribution part at 1310/1550 nm• Spliced splitter: IL and ORL between OLT and ONT at 1310/1550 nm

Loss Test Set/ORL Meter Testing

C e n t r a l O �c e

1310 nm

1490/ 1550 nm

PON OLT

Video AMP

RF Video

OLT-55/ORL-55 ORL/IL

OLT-55/ORL-55 ORL/IL

Feeder Fiber

Drop Terminals

Passive Splitter

ONT

ONT

ONT

ONT

Distribution Fibers WDM

OTDR Testing

Acceptance testing with OTDRs• Connectorized splitter: Link/event IL and ORL of the feeder part at 1310/1550 nm Link/event IL and ORL of the distribution part at 1310/1550 nm • Spliced splitter: Link/event IL and ORL between OLT and ONT at 1310/1550 nm


1310 nm

1490/ 1550 nm

PON OLT

Video AMP

RF Video

T-BERD/MTS-2000OTDR/FiberComplete



Feeder Fiber

Drop Terminals

Passive Splitter

ONT

ONT

ONT

ONT


PON Fiber Installation and frame connectionWhen laying fiber, test splicing with OTDRs at 1310/1550 nm(a bidirectional OTDR testing is recommended)

Fiber Installation

Fiber under Test

Patch Cord


Feeder Fiber

Splitter Location

Distribution Fibers

Drop Terminal

Drop Terminal

JDSU Solutions

Description

Construction

Turn-up

Troubleshooting

FI-60 FiberIdentifier

FFL-050 and FFL-100 Visual Fault Locator

P5000i OTS-55 Optical Talk Set

OLT-55 Loss Test Set

ORL-55 Return Loss Meter

OLP-57 Selective PON Power Meter

T-BERD/MTS-2000 andT-BERD/MTS-4000

OTU-8000

WDMEthernet TDM, WDM, ATM

TDM, WDM, EthernetNG-PON1:

G-PON compatible

EthernetATM, TDM, WDM, Ethernet

ATMTra�c Mode

1550 nm1550 nm Yes, to be defined1570 nm1550 nm1550 nmVideo overlay

1575 – 1580Up: 1260 – 1280

Down: Down: 1575 – 1580(WDM overlay

possible)Up: 1260 – 1280

Down: 1490Up: 1310

Return Path: 1570 or 1610

To be defined Down : Down : 1400 – 1500

Up: 1260 – 1360Video overlay

1550

1480 – 1500(WDM overlay

possible) Up: 1260 – 1360

Down: 1480 – 1500Up: 1260 – 1360

Wavelengths (nm)

64(128 possible)

64 (128/256 possible)

64 64 (128/256 possible)

3264 (128 considered)

32Maximumnumber of branches

20/24/29 dB20-30+ dB TBD Like selected PON To be defined15/20 dB20/25/28/30/32 dB

20/25/30 dB IL

Maximum

10/20 km60 km max, 20 kmdi�erential

20 km 60 km max, 20 km di�erential

10/20 km60 km max, 20 km di�erential

20 km

PON Standards

Up: 10

Down: 10

Up: NG-PON1/XG-PON1: 2.5

NG-PON1/XG-PON2: 10NG-PON2: 10

Down: 10

Like selected G/E-PON

Like selected G/E-PON

Up: 1.25

May fall underNG-PON2

May fall under NG-PON2

Up: 0.155, 0.62, 1.25, 2,48

Down: 1.25 Down: 1.25 – 2.5Down: 0.155, 0.62, 1.25

Up: 0.155 – 0.62

Next Gen PON

1550 nm

Span

Bit rates (Gbps)

IEEE 802.3avEnd 2009

ITU-T G.987.xMid 2010

IPS SP910 To be defined Applicable standard

IEEE 802.3ahITU-T G.983.x ITU-T G.984.x

Understanding PON Testing

To learn more, visit www.jdsu.com/fttxN o t e : S p e c i fi c a t i o n s , t e r m s, and conditions are subject to change without notice.© 2 0 12 J D S U n i p h a s e C o r p o r a t i o n . A l l r i g h t s r e s e r v e d . 30162962 001 0612 PON . P O . FOP . T M . A E

Loss Budget

A t t e n u a t i o n A = αL + αs x + αc y

α: a t t e n u a t i o n c o e �c i e n t o f t h e fi b r e αs : m e a n s p l i c e l o s s αc : m e a n l o s s o f l i n e c o n n e c t o r s x: n u m b e r o f s p l i c e s y: n u m b e r o f l i n e c o n n e c t o r s L: li n k l e n g t h

When the network is in service: Downstream transmission from OLT to ONT: - Voice, data & optional IP video at 1490 nm - Optional analog video at 1550 nm

Upstream transmission from ONT to OLT: - Voice & data at 1310 nm

0 .4 d B 4 0 . 1 dB

F i b e r l o s s

1 d B C o n n e c t o r s 2 0 . 5 d B

S p l i c es

1 8 d B S p l i t t e r ( 1 : 6 4 ) 1 1 8 d B

T o t a l L o s s N u m b e r / L i n k L o s s

T y p i c a l P O N l o s s b u d g e t

1 0 k m 1 3 1 0 n m 0 .3 5 d B / k m 3.5 dB

1 4 9 0 n m 0 . 22 d B / k m 1 0 k m 2.2 dB

1 0 k m 1 5 5 0 n m 0 .2 d B / k m 2 dB

T o t a l L o s s

1 3 1 0 n m 1490 n m 1 55 0 n m

21.6 dB 2 2. 9 d B 21.4 dB

OTDR PON Trace

1

2

3

4

S p l i t t e r

S p l i c e

C o n n e c t o r

L a u n c h cable

5 E n d o f fiber

1 2

3

3

4

2

5

O T D R P O N t r a c e from the ONT with cascaded splitters

PON Power Meter

Meter 3

Meter 1

Meter 2

1310 nm 1490 nm 1550 nm

OLP-4057 PON Power Meter

C e n t r a l O �c e PON OLT WDM

Video AMP

RF Video

ONT

1310 nm

1490/ 1550 nm

ONT

1310 nm

1490/ 1550 nm

Passive Splitter

Distribution Fibers

Broadband Mode • Broadband power meter (780 up to 1650 nm) • Basic power level measurements (when no 1550 nm video overlay is present).

Through Mode • FTTH PON power meter for turn-up and maintenance. • Simultaneously measure 1490, 1550 nm (downstream) and 1310 nm (upstream) • In Through mode, insert a PON power meter into a network to measure power levels (for both upstream and downstream). • The PON power meter does not a�ect the tra�c and can be used to troubleshoot at any point in the network.

T h r o u g h m o d e c a p a b i l i t y

Acronyms and Abbreviations

ATM Asynchronous Transfer Mode B-PON Broadband Passive Optical Network CO Central O�ceDSLAM Digital Subscriber Line Access Multiplexer E-PON Ethernet Passive Optical Network G-PON Gigabit Passive Optical Network IL Insertion Loss NOC Network Operation Center OLT Optical Line Terminal ONT Optical Network Terminal ONU Optical Network Unit ORL Optical Return Loss OTDR Optical Time Domain Reflectometer PON Passive Optical Network RFoG Radio Frequency Over Glass TDM Time Division Multplexing WDM Wavelength Division Multiplexing

The ORL-55 Optical Return Loss Meter combines three functions in one field-optimized instrument, including an optical return loss meter, an optical power meter, and a triple- wavelength laser source.

The OTU-8000 lies at the core of JDSU optical network management system (ONMSi) combining an in-service OTDR and an optical switch to monitor hundreds of fiber links.

Turn-up and Troubleshooting Testing Fiber under Test

Patch Cord

Copper

Equipment Turn-up and Troubleshooting Network Troubleshooting

PON Equipment Turn-Up and Troubleshooting Before activating the network or when connecting an ONT: • Measure optical power at the OLT (1490/1550 nm) to ensure delivery of su�cient power to the ONTs• Measure optical power at each splitter output• Measure optical power at the ONT (1310/1490/1550 nm)• Use PON selective power meter to troubleshoot at any point in the network


1310 nm

1490/ 1550 nm

PON OLT

Video AMP

RF Video

T-BERD/MTS-4000 OTDR/PON Power Meter



Feeder Fiber

Drop Terminals

Passive Splitter

ONT

ONT

ONT

ONT


PON Network Troubleshooting • Measure power levels with the ONT PON power meter• Conduct an OTDR test from the ONT or drop terminal (when some ONTs respond) -> In-service OTDR (1625 or 1650 nm) • Conduct an OTDR test from the splitter or OLT (when no ONTs respond)


1310 nm

1490/ 1550 nm

PON OLT

Video AMP

RF Video

T-BERD/MTS-2000OTDR

T-BERD/MTS-2000OTDR

Feeder Fiber

Drop Terminal

Passive Splitter

ONT

ONT

ONT

ONT


Drop Terminal

PON Test System

1xn

1xn

1310 nm

1490 nm

Central O�ceServing up to 10,000 customers

Switch

In-Service OTDR 1650 nm

OLT

OLT

WDM

WDM

ONT

ONT

x

ONT n

ONT 1

The peak of ONT 1 is missing

10 GE-PON10 G-PON R F o G o v e r P O N Pure WDME -P O N G -P O N B -P O N

We wrote the bookson Fiber Optic Testing.Visit us online for your free copies.

Fiber Optic Testing

Volume 2

The FI-60 identi�es optical signals on �ber without opening it at the splice point. It also can detect continuous wave, live optical transmission, and 270 Hz, 1 kHz, and 2 kHz modulated tones.

A visual fault locator is essential for quickly and easily locating the exact area where problems exist in �ber cables so technicians can trouble-shoot, diagnose, and �x them e�ciently.

The P5000i digital analysis microscope makes it quick and easy to certify that every connection in your network is clean and optimized. Inspect, save pictures, and perform pass/fail analyses using JDSU T-BERD/MTS platforms.

The OTS-55 transmits digital voice clearly over a single �ber. Technicians can conveniently use a headset or “speakerphone” mode to communicate hands-free.

The OLT-55 measures optical power and IL. It is used for installation, maintenance, and troubleshooting of single mode �ber. It also can be used as a standalone power meter or laser source.

The OLP-57 Selective PON Power Meter tests FTTX/PON systems. Its through mode can simultaneously measure all three �ber wavelengths 1490 nm and 1550 nm downstream and 1310 nm upstream

The T-BERD/MTS-2000 and T-BERD/MTS-4000 are modular platforms. The OTDR module measures attenuation along the �ber, detect events, and measures ORL and IL. The selective PON power meter measures power level in pass-through mode

OTDRs can automatically monitor PON networks while in service. At each acquisition, it checks the peak level that the re�ective termination generates. The peak will disappear if the �ber is cut or the level will decrease during attenuation. This system checks for �ber continuity from the CO to the customer and is the only way to know whether problems stem from the physical infrastructure (�ber, splitter, connector) or the equipment (OLT, ONU, ONT).