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Turnup Guide

Once the ONT142R has been installed, connected to the upstream Optical Line Terminal (OLT) with an optical fiber cable, configured and activated by the Element Management System (EMS), and the installation verified, it is ready for use.

Thereafter, when DC power is applied through either the PWR connector or the UPS connector on the rear edge of the unit, the ONT142R boots up, downloads its configuration information from the OLT, and begins operation without user intervention.

There is no power switch. The ONT is designed to operate as long as DC power is applied, and it has a working optical connection to the upstream OLT.

The ONT142R has LED indicators that show the status of various ONT functions as it operates and the progress of ONT processes.

There are no switches or controls that affect the normal operation of the ONT142R. 

A Reset switch is provided. However, in the case of the rare event when the ONT142R becomes lost or confused.

ONT142R Indicators and Switches

Ten LED indicators are located across the top of the unit near the front edge.

A Reset switch is accessible through a small hole in the right edge of the ONT142R case.

 

ONT142R Indicators - Status

Status indicators show the current condition of the various functions of the ONT as it operates.

Information Note: Some indicators may never be lit. If the function associated with a particular indicator is not configured by EMS, or if the function is not being used on the ONT, the associated indicator may always be off. For example, if no VoIP lines are configured, the VoIP indicator will remain off.

LED Hold

The ONT142R can be configured to turn off all LED indicators after a specified period of time. This keeps an otherwise dark room from being illuminated by bright and flashing LEDs, or users working near the ONT142R from being distracted if the indicators are in their field of view. 

LED Hold time for the ONT is set by the Element Management System (EMS). The countdown timer begins after ONT boot up and normal ONT operation begins.

When the LED Hold timer expires, all ONT indicators go off.

The default LED Hold setting in EMS is 0 seconds, which keeps the ONT indicators on all the time.

LED Hold Override

Any change in the operation of the ONT142R will override the LED Hold function and cause the indicators to be turned on again for the specified LED Hold time:

  • Completion of ONT restart after power loss and restore or ONT reset
  • Loss of the optical link to the OLT or OLT reset
  • Equipment is plugged into an ONT port
  • Any equipment that is plugged into an ONT port is unplugged.
  • Any change in the communication status of equipment that is plugged into an ONT port:
    • A connected POTS device goes off hook or on-hook.
    • A connected Ethernet device powers down or otherwise loses the link to the ONT

When the LED Hold function is overridden, only the indicators that would be on if the LED Hold function were not set will go back on. For example, if VoIP is not configured for this ONT, the VoIP indicator would not have been on before the LED Hold timeout, and it will not go on when the normal operation of the ONT is disturbed and the LED Hold function is overridden.

ONT142R LED Indicator Quick Reference Table

Table A - ONT142R LED Indicator Quick Reference Table
 

  LED   Indications   Comments
Power
Green ONT is powered and ready.  This is the normal condition of this indicator.
Green Blink Slow Flashes one-half second on and one-half second off
  • ONT is downloading firmware (20 to 45 minutes)
  • ONT is performing a power-on elf test (~30 seconds)
  • ONT is running on battery power from the BBU.
Green Blink Fast ONT booting - flashes one-quarter second on and one-quarter second off. 
This should complete within approximately 7 seconds of power being applied.
Dark No DC power is applied to either the power connector or the UPS connector
PON
Red Optical cable is not connected, PON is down. or ONT is in eStop.
Red Blink Slow ONT is ranging. This should complete within about 5 seconds.
Green Blink Slow Firmware Download failed.
Green PON is normal and is service - an optical link is established with the OLT and the OLT is ranged.
Red/Green Blinking Alternately OLT is downloading software over the optical link with the OLT.
 
GE1-GE2
Green The Ethernet port is linked at 1Gb/s, no data is passed.
 
Green Blink The Ethernet port is linked at 1Gb/s and passes data. As data transfer is sporadic, there will be periods or greater and less flashing.
Amber The Ethernet port is linked and 10/100 Mb/s, no data is passing.
Amber Blink The Ethernet port is linked to 10/100 Mb/s and passes data. As data transferred is sporadic, there will be periods or greater and less flashing.
Green/Amber Blinking Alternately PoE has detected an overcurrent condition (powered device drawing mor than allocated power) in ONT has insufficient power for the attached device.
Dark Nothing is plugged into the connector, the connected device is OFF, ad device is plugged into the connector, but there is no link, or the port is not provisioned through EMS at the OLT.
VolP
Green All configured lines are registered,
Amber A configured line is not registered,
Dark No VOIP lines are configured.
POTS1 & POTS2
Green
 		 The voice line is off-hook.
Green Blink Voice line is ringing.
Dark
  • Voice line is on hook
  • The POTS line is not configured for use (EMS).
  • No POTD devices are connected

The possible states of each of the ten LED indicators on the top of the ONT142R are shown and defined in Table B.

ONT142R Indicators - Process Progress

The ONT142R goes through several processes from time to time. The LED Indicators show the progress of these processes.

Startup

Once the ONT142R has been installed and configured, it goes through a startup process when:

  • DC Power is applied to the ONT
  • DC Power is restored to the ONT after an outage
  • The ONT is reset using its Reset button.
  • The ONT is reset remotely by the EMS

Steps of the ONT142R startup process at power up:

  1. Load operating firmware from internal non-volatile memory (about 4 seconds)
    • The Power Indicator flashes green rapidly and the PON indicator is off
  2. Perform a power-on self-test (POST) (about 30 seconds)
    • The Power Indicator flashes green slowly, stops, and flashes slowly again
  3. Power-On Self-Test (POST) completes
    • The Power Indicator goes off (about 3 seconds)
  4. ONT ready to range
    • The Power Indicator is solid green and the PON Indicator is solid red
  5. ONT establishes an optical connection with the Tellabs OLT and ranges
    • The Power Indicator is solid green and the PON indicator is blinking red (about 5 seconds).
  6. ONT is ranged, and configuration data has been obtained from the OLT and loaded into memory.
    • The Power Indicator and PON Indicator are solid green.

Both the Power Indicator and PON Indicator solid green are the normal condition for the ONT142R when it is operating normally and connected to the OLT. 

Other indicators will light or flash depending on what devices are connected to the ONT142R, if they are configured properly through EMS, and if they are operating normally (or not)

Table B - ONT142R Startup Indicator Quick Reference

Step
 		 Power

Indicator		 PON

Indicator		 Description Time
0
ONT is not powered ____
 
1
ONT is booting from internal memory ~5 s
2
ONT is performing POST ~30 s
3 ONT completes POST ~3 s
4
ONT is ready to range ____
5
ONT connecting to OLT and ranging ~5 s
6
ONT is connected to OLT and ranged ____

 

 

 

 

 

 

 

 

Firmware Download

During installation and occasionally during the service life of the ONT142R, new ONT firmware may be downloaded from the OLT. This process can take as little as 20 minutes or as long as about 45 minutes, depending on the number of ONTs that are being updated at that moment.

Near the end of the ONT installation process, when the ONT establishes communication with the upstream OLT, it reports the version of its currently installed firmware to the OLT. If a later firmware version is available, the OLT sends it down the optical cable to the ONT.

Likewise, every time the ONT142R starts up, it reports the version of its currently installed firmware to the upstream OLT. If a later firmware version is available, the OLT sends it down the optical cable to the ONT after it starts up. 

Because the ONT142R may run for weeks or months without restarting, the system administrator can also push new firmware to the ONT142R at any time once it becomes available. This will likely be scheduled during the early morning hours to minimize the number of ONT users that might be inconvenienced while the new firmware downloads.

While the firmware download is in progress, the PON Indicator flashes alternately red and green, and the ONT does not operate normally.

Once the download is complete, the ONT resets, reboots, and then resumes normal operation. Steps for the firmware download:

  1. Download firmware from the OLT (between about 20 and 45 minutes)
    • The PON Indicator flashes alternately red and green slowly.
  2. Download completes and ONT resets and begins the startup process (See Startup Process, above)
    • The Power and PON Indicators go off

If the firmware download fails, the PON indicator flashes green slowly. Contact the system administrator for assistance to activate the ONT.

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