2:32 Splitter Fiber Connections

Laser Safety

Warning 1! Personnel handling fiber optic cables must be trained for laser safety.

Warning 2! Optical Fibers emit invisible laser radiation. Avoid direct exposure to the beam. Never look into the end of a Fiber or into a Fiber connector on a cable or a device. Permanent eye damage or blindness can occur quickly from laser radiation.

Fiber Optic Cable

Ensure that the fiber connectors are properly cleaned per local standards. Dirty connectors may result in inaccurate measurements.

Caution 1: Fiber optic cable installation and maintenance should only be performed by trained service personnel.

Caution 2:  Do not bend the fiber optic cable to a diameter smaller than 7.5cm/3 inches. Doing so may damage the fiber or prevent the signal from passing through properly.

If a Passive Optical Network (PON) Protection Group (PPG) scheme is to be utilized, a 2:32 PON Fiber Splitter must be installed. Following the installation of the 2:32 Fiber Splitter and customer Optical Network Terminals (ONTs), fiber connections must be made between the Quad Optical Input Units (QOIU7s) in the OLT and the splitter shelf, and from the splitter shelf to the customer ONTs.

Use the following procedure to verify and connect fiber optic cables between the OLT and the 2:32 fiber splitter.

Note 1: PON Protection Groups can be sourced from; 1) two PON ports on the same PON card, 2) PON ports from two PON cards within the same OLT, or 3) PON ports on different PON cards in different OLTs.

Note: 2: Ensure that the proper fiber connectors are available before proceeding. The connectors on the fiber jumpers at the PON card require UPC connectors. Ensure that the connectors, UPC or APC are on the splitter end. The same is true for the splitter-to-ONT fiber cables.

1. Route the single-mode fiber jumper for the primary PON Protection Group primary connection from the designated PON port to the #1 input on the splitter shelf (refer to the following illustration).
   
    

2. Route the single-mode fiber jumper for the primary PON Protection Group secondary connection from the designated PON port to the #2 input on the splitter shelf.
3. Remove the protective cap from the fiber connector at the primary PON card.
4. At the OLT supplying the primary input, clean the fiber connected, according to local practice, and insert the fiber into the designated PON port. An audible click is heard when the connector is inserted completely.
5. At the splitter, uncap the fiber connector.
6. Clean the fiber connector, according to local practice.
7. Using an optical power meter, measure the downstream 1490nm power level.
8. Record this as the Primary_In level.
9. Clean the fiber connector, according to local practice, and connect the Primary PON input to the splitter.

10. Repeat Step 1 through Step 7 for the PON Protection Group secondary connection from the designated PON port to the #2 input on the splitter shelf.
11. Record this as the Secondary_In level.
12. Clean the fiber connector, according to local practice, and connect the Secondary PON input to the splitter.
13. Calculate the difference between the Primary_In and the Secondary_In input power levels, plus an offset of 5db.
14. If the Primary_In power level is not greater than, or equal to, the Secondary_In power level, plus the 5db offset, add a 5db attenuator to the Secondary PON input.

15. Clean and connect each ONT output fiber connector to the designated splitter shelf output.