Installation

Installing the Tellabs ONT142R consists of the following steps:

1. The physical installation:
   • Placing the ONT142R on a desktop or other surface
   • Mounting the ONT142R to a wall, the back or underside of a desk, or some other surface
2. Connecting the ONT142R to DC power:
   • AC adapter at the installation location
   • Remote bulk DC power supply wires
3. Connecting the optical fiber cable to the ONT142R
4. Verifying a solid green PON LED Indicator on the ONT

Note 1: The Tellabs ONTs are designed to operate in specific orientations and have the expectation of free airflow around the unit to ensure the ONT stays within the ONT’s design limits. ONTs should never be stacked or strapped together as this typically does not give sufficient air flow to maintain the unit within temperature specifications. Multi-ONT configurations should use the proper mounting brackets, and/or DIN rail shelf to ensure a proper installation. Failure to follow these practices may void your warranty and cause premature failure of the unit.

Note 2: If the upstream equipment (OLT) is not yet operational, it is impossible to complete the final step of the procedure at the time of installation. Nevertheless, the ONT is not considered to be fully installed until this step is completed.

Note 3: When the ONT is first connected to the PON, it must download and install software. This process can take up to 20 minutes to complete. If multiple ONTs need to be installed at the site, the next physical install can proceed.

Physical Installation

On a Desktop

The ONT142R can simply be placed on top of a desk, a table, a shelf, or any similar object.

Mounted to a Wall

The ONT142R can be attached to a wall, to the top, back, or underside of a desk or table, or to some other surface using the optional Wall Mounting Bracket and screws.

Note: Verify that the owner of the building or the owner of the individual unit or furniture is aware that holes will be drilled and screws and/or wall anchors will be used to mount the ONT to a wall or to furniture before beginning installation

Before mounting the ONT142R, find the place where the ONT will be mounted and decide how it should be orientated for best access and ease of use. Consider that up to 10 cables will be attached to the rear edge of the ONT, either just after installation or sometime later. Also consider that it may be helpful if the user can see the LED Indicators on the top of the unit.

Mounting The Bracket

1. Place the Wall Mounting Bracket on the surface it will be attached to. Position the bracket so that it will hold the ONT in the desired orientation, being aware that the long edge of the bracket that has the entrance and exit holes for the optical fiber cable should be at the back of the ONT (near the connectors).
2. Select at least two holes in the bottom of the bracket and mark the mounting surface.
3. Carefully drill holes in the marked locations appropriate for the fasteners that will be used.
4. Install drywall or masonry anchors in their holes if they are used.
5. Hold the bracket in position and secure with screws through the selected holes.

Storing Excess Optical Fiber Cable Length Inside the Bracket

If the optical fiber cable is a little long, the excess can be wound around guides molded inside the Wall Mounting Bracket before the ONT is attached. This prevents cable bend radii that are less than optimum. Several feet of cable can be stored inside the bracket.

It is very important that the correct entrance and exit holes in the bracket are used.

1. Mark the optical fiber cable about 10 inches from the end of the connector with a Sharpie or other permanent marker, or a piece of electrical tape.
2. Position the mark on the cable just outside bracket and push the cable into the strain-relief fingers just inside the cable exit hole. The fingers will hold the cable in place while it is wound on the guides.

Wall Mounting Bracket

3. Continue winding the cable around the guides and under the clips until most of the excess cable length is used up.
4. Route the cable out of the entry hole in the bracket on the last turn.
5. Use a short piece of electrical tape to hold the cable in place just inside the entry hole.

Attaching the ONT to the Wall Mounting Bracket

There are four sets of hooks that stick up, out of the Wall Mounting Bracket. These hooks match rectangular holes in the bottom of the ONT case.

1. If excess optical fiber cable is wound up inside the bracket, the ONT should be oriented so that the rear edge (with all the connectors) is adjacent to the optical fiber cable entry and exit holes in the bracket.
2. Hold the ONT centered over the Wall Mounting Bracket such that the four sets of holes in the bottom of the ONT case are over the matching hooks in the bracket.
3. Move the ONT until the bottom of the case lightly touches the four sets of hooks and move it around until the hooks find their holes. This can be heard and felt. 
4. When the hooks and holes are lined up, push one side of the ONT against the bracket until that set of hooks engage. This also will be heard and felt. Then engage the hooks in the remaining three sides.
5. Find the serial number sticker on the outside of the PON box, remove it carefully, and affix it to the PON case, or some other surface near the PON so that the serial number is visible.

Removing the ONT from the Wall Mounting Bracket

It may be helpful to disengage the ONT from the Wall Mounting Bracket for better access to the connectors.

1. Use the blade of a medium slot screwdriver as a wedge between the ONT case and the Wall Mounting Bracket at the center of a short side.
2. Twist the screwdriver or pry with it to pull the hooks on that side out of their holes.
3. Repeat at an adjacent side and work around until the ONT is separated from the bracket.

Connecting the ONT142R to DC Power

DC power for the Tellabs ONT142R can be provided by an optional desktop AC adapter (power brick) at the point of installation, or by a remote bulk DC power supply.

The AC adapter, and its AC line cord, are all optional accessories, available from Tellabs separately and at extra cost. Contact your Tellabs sales representative for details and ordering information. 

Power From an AC Adapter

The optional AC adapter provides 54 VDC to the ONT.

1. Unravel the line cord and DC output cable of the AC adapter.
2. Plug the DC output cable from the AC adapter into the PWR connector on the ONT142R.
3. Plug one end of the line cord into the AC adapter and the other end into a nearby AC outlet.

If the AC outlet is live, the ONT Power LED Indicator will begin flashing green in a few seconds. After a few seconds more, the indicator changes to slow flashing green, which continues for about 30 seconds and then goes solid green.

Power From a Remote Bulk DC Power Supply

The process for connecting the DC power from a remote bulk DC power supply is a bit more involved than connecting DC power from an AC adapter.

Note: DC power may be delivered to the ONT installation location via a separate DC power cable or by power conductors in an optical/copper composite cable.

Have a (locally sourced) DC power pigtail connector handy. This procedure is for a pigtail connector with screws.

1. Go to where the bulk DC power supply is located and turn off or disconnect the DC power to the location where the ONT is being installed. Note which wire (color) is positive.
2. Return to the ONT installation location and use a DMM to make sure that there is no voltage on wires of the remote bulk DC cable. If voltage is found (~ 54 VDC), go back to the bulk DC power supply location, find, and shut off the DC power to the correct ONT installation location. Check for voltage again at the ONT installation location.
3. Strip about 3/16 inch of insulation from the ends of the DC wires and twist the strands of each wire tightly.
4. Loosen the screw on the positive side of the connector block, insert the positive wire, and tighten the screw securely.
5. Repeat for the negative wire.
6. Go to where the bulk DC power supply is located and restore power to the DC cable.
7. Return to the ONT installation location and use a DMM to make sure that DC power (~ 54 VDC) is available at the 1.7-mm power connector. The connector center must be positive. If polarity is reversed, shut off power to the DC cable, reverse the cable connections at the connector, and restore power. Note that if the connector has reversed polarity and is plugged into the ONT, the ONT will not be damaged. It just will not operate.
8. When the pigtail DC power connector has power and the polarity is correct, wrap several turns of electrical tape around the screw terminal block to cover the screws and reduce the chances of something metallic getting across the screw terminals.
9. Plug the pigtail DC power connector into the ONT PWR connector.

The ONT Power LED Indicator will begin fast flashing green in a few seconds. After a few seconds more, the indicator changes to slow flashing green, which continues for about 30 seconds and then goes solid green.

Connecting the Optical Fiber Cable to the ONT

The optical fiber connector is located on the right side of the ONT when viewed from the rear. A removable cover protects the connector and prevents laser light from exiting the ONT into the room.

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.

1. Remove power from the ONT.
2. Turn the ONT upside down with the edge having all the connectors facing away.
3. Press on the cover with a thumb and push the cover away from you in the direction of the arrow molded in the cover until it slides off the ONT case.
4. Remove the protective dust cover from the ONT optical connector exposed when the cover was removed. Clean the connector according to local practices, if necessary.
5. Orient the optical fiber cable connector so that the key matches the keyway slot in the ONT connector.
6. Slide the cable connector into the ONT connector until a click is felt and heard.

Cable Routing and Management

The optical fiber cable and DC power cable are the fewest cables that will be connected to a properly installed ONT142R. But there may be many more if related equipment is at the install location and is connected to the ONT during the installation.

In all cases, it is important to dress cables connected to the ONT neatly and route them such that they are out of the way and cannot easily be stepped on or tripped over. Behind furniture and along baseboards are good routes when available.

It is usually a good idea to bundle cables that are going to the same place using some sort of cable ties. Reusable cable ties (Velcro) allow additional cables to be added to the bundle, or unused cables to be removed from the bundle easily.

If there is excess optical fiber length in a desktop installation, or that is not wound up inside a Wall Mounting Bracket, it can be loosely coiled and placed behind the desk or another piece of furniture. The optical fiber cable can perform poorly or be damaged if it is bent sharply. Therefore, a coil diameter of at least 6 inches in diameter is recommended. Use electrical tape or Velcro cable ties to hold the coil together in several places. Nylon zip ties can be used if care is taken to not crush the cable.

Verifying a Solid Green PON LED Indicator on the ONT

After the optical fiber cable is connected to the ONT, it will try to communicate with the upstream Optical Line Terminal over the optical fiber cable. If it is successful, the PON Indicator will be solid green.

If it is not successful, the PON Indicator will be solid red.

Contact the System Administrator to have the ONT activated. It may be necessary to provide or verify the PON serial number.

Once the PON is activated, the PON Indicator will be solid green.