ADC Passive ptical Network (PN) Test and Turn-Up Procedures ADCP-96-4 Issue 4/009 Content Page INTRDUCTIN............................................................................. LIST F ACRNYMS AND ABBREVIINS........................................................... 3 GENERAL INFRMIN.................................................................. 4. Test Instrumentation............................................................... 4 TESTING........................................................................................................................................................ 6. C Fiber Distribution Frame to SP Feeder Cable through Splice Points............................ 7.3 C to Splitter utput in FDH.......................................................... 7.4 FDH to Distribution Cable............................................................ 8. FDH to....................................................................... 9 3 TURN UP............................................................................ 0 3. Central ffice................................................................... 0 3. FDH Splitter Cabinet.............................................................. 0 3.3 Access Terminal................................................................. 0 3.4 Final verification and tests.......................................................... 0 4 CUSTMER INFRMIN AND ASSISTANCE................................................... INTRDUCTIN This document discusses installation testing of a typical FTTH Passive ptical Network (PN) cable plant using connectorized splitters. The PN network can be divided into several logical sections for testing purposes. Sectional testing solutions are dependant upon the required Quality of Service. Revision History ISSUE DE REASN FR CHANGE 4/009 riginal. List of Changes PAGE IDENTIFIER DESCRIPTIN F CHANGE All New 46934 Rev A Page
Trademark Information ADC is a registered trademark of ADC Telecommunications, Inc. Related Publications Listed below are related manuals and their publication numbers. Copies of these publications can be ordered by contacting the ADC Technical Assistance Center at -800-366-389 (in U.S.A. or Canada) or 9-97-3000, extension 7347 (outside U.S.A. and Canada). Title/Description ADC ptical Return Loss (RL) Testing ADCP Number ADCP-90-387 Admonishments Important safety admonishments are used throughout this manual to warn of possible hazards to persons or equipment. An admonishment identifies a possible hazard and then explains what may happen if the hazard is not avoided. The admonishments in the form of Dangers, Warnings, and Cautions must be followed at all times. These warnings are flagged by use of the triangular alert icon (seen below), and are listed in descending order of severity of injury or damage and likelihood of occurrence. Danger: Danger is used to indicate the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Warning: Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Caution: Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the hazard is not avoided. General Safety Precautions Caution: Fiber optic cables may be damaged if bent or curved to a radius that is less than the recommended minimum bend radius. Always observe the recommended bend radius limit when installing fiber optic cables and patch cords. Danger: Exposure to laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not assume the laser power is turned-off or that the fiber is disconnected at the other end. Caution: Improper handling can damage fiber optic cables. Do not bend fiber optic cable more sharply than the minimum recommended bend radius specified by the cable manufacturer. Do not apply more pulling force to the cable than specified. Do not compress the fiber or allow it to kink. Page
Warning: Invisible infrared radiation can seriously damage the retina of your eye. Do not look into the launching (output) end of an active fiber. A clean, protective cap or hood MUST be immediately placed over any radiating bulkhead receptacle or optical connector to avoid exposure to potentially dangerous amounts of radiation. This practice also helps to prevent contamination of connectors and adapters. LIST F ACRNYMS AND ABBREVIINS The acronyms and abbreviations used in this manual are detailed in the following list: C FDF DN LT NT SP TDR PN RX SMFC SMLC SMSC SRC TX Access Terminal Central ffice Fiber Distribution Frame Fiber Distribution Hub/Terminal ptical Distribution Network ptical Line Termination ptical Network Termination utside Plant ptical Time Domain Reflectometer Passive ptical Network Radio Frequency Receive SingleMode FC SingleMode LC SingleMode SC Source Transmit Value Added Module Wave Division Multiplexer Page 3
GENERAL INFRMIN Failure to adequately test to an acceptable level at the time of installation will result in customer dissatisfaction. To achieve adequate testing requires careful consideration and planning. It is possible to achieve adequate testing at a reasonable price, however poor planning will result in inadequate testing with a higher initial cost. A PN network is a Point to Multipoint architecture servicing a number of customers. Testing is more complex than in traditional Point to Point because a given customer s circuit is composed of both shared and dedicated fiber. Indeed, the increased test complexity, combined with increased cost constraints, means that testing needs to be very carefully evaluated and implemented. PN networks use passive splitters to distribute fiber to individual homes or businesses. ne fiber is optically split into 6, 3, 64, or more fibers, which are then distributed to residential or business subscribers. The switching and routing is done at the carrier's central office. nce on the customer's premises, the fiber connects to a Network Interface Device (NID), called variously an ptical Network Termination (NT) or an ptical Network Unit (NU). This device converts the optical signal into a format that can be used directly by the customer.. Test Instrumentation Several instrument types may be used to perform PN installation tests as shown in Table. Table. Typical PN Test Instruments TEST MEASUREMENT INSTRUMENT PURPSE F TEST TEST CMPLEXITY Connector Microscope Check contamination Check end face quality Fiber Identification Section Loss VLS Fiber Identifier Source & Meter Source & meter or Loss Test Set Identification of designated fiber Section loss of the cable Pass/Fail evaluation Warranty System RL RL meter / LTS Ensure RL is within design parameters. E.g. ITU-G-983 Cable characterization PN TDR Physical fault location Loss & reflection at joints Easy Easy - Medium Easy Splice Loss Splicer with auto-alignment Check Splice Loss Easy ptical Power Selective Power Meter Check Transmission Power Easy Faulty NID NID Diagnostics Spare NID Determine if NID has a fault Easy Head Room In line attenuator Determine if design transmission margin is met. Easy Easy - Medium High to very high Page 4
This document provides general guidelines for the Test and Turn Up Procedures for a PN Network. It is assumed that the correct placement and construction of all cabinets and terminals has been completed and verified. A typical network is shown in Figure. Danger: Exposure to laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not assume the laser power is turned-off or that the fiber is disconnected at the other end. CRSS-CNNECT CNTENT VIDE LT LT MDULE FDH (also known as FDT) 3 DISTRIBUTIN NT (TYP) DRP (TYP) 347-A Figure. Typical Communications Network TESTING This section contains testing procedures for the portions of the network and components circled in Figure. Always start at one end of the network under test and work your way to the opposite end. CRSSCNNECT C D CNTENT VIDE LT LT A MDULE B 3 E DRP 343-A NT DISTRIBUTIN Figure. Passive ptical Network A B C D E Section. Section. C Fiber Distribution Frame to SP Feeder Cable through Splice Points Section.3 C to Splitter utput in FDH Section.4 FDH to Distribution Cable Section. FDH to Page
Table. Loss Specifications ITEM/CMPNENT AVERAGE LSS PER UNIT F MEASUREMENT NTES CNNECTRS SPLICING APC 0.3 db Loss per mated connector Single Fusion 0.04 db Loss per splice Mass Fusion 0. db Loss per splice SPAN LENGTH SPLITTERS nm 0.4 db/km Loss per Km of fiber placed /nm 0.3 db/km Loss per Km of fiber placed x 3.7 db Loss per splitter x4 7. db Loss per splitter x8 0.38 db Loss per splitter x6 4.0 db Loss per splitter x3 7.0 db Loss per splitter x db Loss per The applicable standards that cover optical couplers are G.67 from ITU and GR-09 from Telcordia. Values may vary per manufacturer.. Light Source & Power Meter Test. Using a light Source & Power Meter, test through the to ensure the device is operating per manfacturers specifications. See Figure 3 for typical schematic.. Record the values observed during the test. MDULE nm UT CMMN nm IN/ nm UT 348-A Figure 3. Schematic Page 6
. C Fiber Distribution Frame to SP Feeder Cable through Splice Points This test is done to establish correct connectivity and verify low splice loss through the fiber distribution frame infrastructure, see Figure 4... TDR Test. Conduct TDR test from fiber distribution frame through the SP feeder cable. CRSSCNNECT CNTENT VIDE LT LT MDULE B 3 DISTRIBUTIN DRP NT 349-A Figure 4. Continuity and Splice Loss Test. Verify the loss is equal to or less than the component values in Table. 3. Record the values..3 C to Splitter utput in FDH Test C Fiber Distribution Frame through feeder cable, splice points and splitter in the FDH. This test is used to verify that new splitters are installed correctly before service is placed on the feeder cable, see Figure..3. Light Source & Power Meter Test. Using a Light Source & Power Meter, test from the C FDF through the feeder cable and FDH splitter to splitter output. Page 7
C CRSSCNNECT CNTENT VIDE LT LT MDULE 3 DISTRIBUTIN DRP NT 340-A Figure. Splitter Installation Testing. Calculate or determine the loss specifications from Table. 3. Record the values..4 FDH to Distribution Cable Test from FDH splitter cabinet out through the distribution cable splice points, see Figure 6. This test is done to establish correct connectivity and low splice loss through the distribution side of the FDH. CRSSCNNECT D CNTENT VIDE LT LT MDULE 3 DISTRIBUTIN DRP NT 34-A Figure 6. to Distribution Cable Testing Page 8
.4. TDR Test. Conduct TDR test from the FDH splitter cabinet through the SP distribution cable.. Verify the loss is equal to or less than the component values in Table. 3. Record the values. Miscellaneous trace views and descriptions can be found in the ADC ptical Return Loss (RL) Testing document ADCP-90-387.. FDH to Test Distribution Network from FDH through splice points and Access Terminal (). This is a test to verify the distribution link from the FDH to the, see Figure 7... Light Source & Power Meter Test. Using the Source & Power Meter, test from the FDH splitter cabinet through the distribution cable output. CRSSCNNECT CNTENT VIDE LT LT MDULE E 3 DISTRIBUTIN DRP NT 34-A Figure 7. to Testing. Calculate or determine the loss specifications from Table. 3. Record the values. Page 9
.. TDR Test to verify and establish the distance from the FHD to.. Conduct TDR test from the FDH through the SP distribution cable.. Verify the loss is equal to or less than the component values in Table. 3. Record the values. 3 TURN UP 3. Central ffice If not already complete, connect from the Packet LT to the PN Port (/nm) of the. If not already complete, connect from the Video LT to the Video Port (nm) of the. Cross-Connect from the Common Port of the to the applicable SP Feeder Cable Port on the Fiber Distribution Frame. 3. FDH Splitter Cabinet If not already complete, connect from the splitter output to the assigned SP Distribution Cable Port. 3.3 Access Terminal If not already complete, connect from the to the NT. 3.4 Final verification and tests. Complete bidirectional Source & Power Meter and TDR testing of the entire PN network from the to the NT. Page 0
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