PON

PON Profile Attributes

The following PON profile attributes are available for user editing.

ONT Management

• Discover Unexpected ONT - Specify whether to enable or disable the PON Unexpected ONT alarms and place the ONT into the Unexpected ONT list. ONTs might be quarantined if:
  • Configured ONTs whose round trip delay drifts outside the window when the Range Lock is enabled and Auto Disable is disabled.
  • An ONT arrives on the PON too many times in a short interval when Excessive Arrivals is enabled; but Auto Disable is disabled.
• Auto Configuration - Specify whether to enable or disable the auto configuration of ONTs. ONTs that arrive on the PON are automatically configured using profiles that have been configured for that ONT Type.
  • Enabled/Disabled (default - Enabled)
• Minimum ONT ID - Specify the minimum number of ONT IDs that the system is allowed to use and assign to the ONTs.
  • Range: 1 - 32, (Default - 1)
• Maximum ONT ID - Specify the maximum number of ONT IDs that the system is allowed to use and assign to the ONTs.
  • Range: 1 - 32, (Default - 32)
• Unexpected ONT Alarm - Specify whether to enable or disable the PON Unexpected ONT alarms and place the ONT into the Unexpected ONT list. ONTs might be quarantined if:
  • Configured ONTs whose round-trip delay drifts outside the window when the Range Lock is enabled, and Auto Disable is disabled.
  • Any ONT that arrives on the PON too many times in a short interval when Excessive Arrivals is enabled; but Auto-Disable is disabled.
    • Enabled/Disabled (default - Disabled)
• Excessive Arrival Violation - When enabled, issues an Auto ONT Disable when too many arrivals per minute occur. This causes a trigger if Auto-Disable is enabled and the ONT will be quarantined. Note: If Auto-Disable is disabled, there is no effect.
  • Enabled/Disabled (default - Enabled)
• (enable)Auto Conversion - Specify whether to enable, or disable, auto conversion of ONTs. When enabled, the system shall, upon detecting an ONT with the same serial number as a currently configured serial number on that PON AND of a different ONT type, the ONT is converted to the new type.
  • Enabled/Disabled (default - Disabled)

PON Configuration

• FEC (Transmit) - Forward Error Correction (FEC) is a technique used for controlling errors in data transmission over unreliable or noisy communication channels. Typically, this adds 3 dB to the PON SNR but lowers the data rate about 12% due to the overhead of the FEC redundancy rates.
  • Enabled/Disabled (default - Disabled)
• PON Type - Specifies PON type
  • GPON|XGSPON, (default - GPON) 
• Receive BER Fail Threshold (10^) - Defines the Bit Error Rate (BER) Failure threshold that causes the system to fail the link.
  • Range: -8 to -3 (default -4)
• Receive BER Maint Threshold (10^) - Defines the BER Maintenance threshold that causes the system to require maintenance
  • Range: -10 to -4 (default -6)
• Enable Path Protection - Enables detection of network path failure
  • Enable|Disable (default - Disable)
• PON Reach - Specify the maximum PON reach for the PON.
  • Range: 20 or 30 Km (default - 30Km)

Bandwidth Utilization

• TCA Integration Period - Specifies the PON Threshold Crossing Alarm (TCA) integration period.
  • Range: 1 - 60 min (default - 1) 
• TCA Periods to Monitor - Specifies the number of periods the TCA has to remain above the TCA for Set / Clear.
  • Range: 1 - 60 (default - 3)
• Receive CIR alarm - Committed Information Rate (CIR), when enabled, generates an alarm when the sum of the committed rates (characterized by the sustained rates) exceeds the PON’s capacity.
  • Enabled/Disabled (default - Disabled)
• Receive CIR Threshold - Specifies the upstream CIR threshold that is configured on the PON before the CIR alarm is signaled. 
  • Range: 1 - 100% (default 100%)
• Receive EIR alarm - Committed Information Rate (CIR), when enabled, generates an alarm when the sum of the committed rates (characterized by the sustained rates) exceeds the PON’s capacity.
  • Enabled/Disabled (default - Disabled) 
• Receive EIR Threshold - Specifies the EIR threshold configured on the downstream PON before the EIR alarm is signaled.
  • Range: 1-100% (default 95%)
• Transmit CIR alarm - When enabled, it generates a CIR alarm when the PON bandwidth utilization in the downstream direction is exceeded.
  • Enabled/Disable (default - Disabled)  
• Transmit CIR Threshold - Specifies the downstream CIR bandwidth threshold configured on the PON before the CIR alarm is signaled.
  • Range: 1 to 100 (default 100%)
• Transmit EIR alarm - When enabled, generates an EIR alarm when the maximum burst tolerance for connections on the downstream PON is exceeded.
  • Enabled/Disabled (default - Disabled)  
• Transmit EIR Threshold - Specifies the transmitted EIR threshold configured on the downstream PON before the EIR alarm is signaled.
  • Range: 1 to 100 (default 95%)

Storm Control

• Looped broadcasts consume all the network bandwidth
• Looped Multicast or overuse causing multicast to consume all or most of the bandwidth
• Limit the impact of DoS Attacks

Storm Control Thresholds

• Unknown Multicast Rate - Input rate threshold
  • Range: 1 to 100% (default 50%)
• Broadcast Rate - Input rate threshold
  • Range: 1 to 100% (default 10%)