Configuration/Port/GPON OLT Profile Help

To modify the displayed settings, click the Provision button.

To update the displayed settings, click the Refresh button.

Profile

Port

The port assigned to this interface.

Oper Status

Indicates the operational status of the GPON OLT port.

Admin Status

The administrative status of the interface.

Up: The interface is enabled and up, and the status of the interface should become standby or operational.

Down: The interface is disabled and down, and the status of the interface whould become shutdown.

Description

Test description of the interface.

Link Status Trap

Indicates whether linkUp/linkDown traps should be generated for this interface.

enabled

for interfaces which do not operate on top of any other interface.

disabled

if they do.

Max RT Propagation Delay

Maximum round trip propagation delay. Combined with maximum ONU response time and preassigned delay determines maximum logical PON distance.

Default 200 usec

Max ONU Response Time

Combined with maximum round trip propagation delay, determines maximum logical PON distance.

Default 50

Preassigned EQD

Combined with maximum round trip propagation delay and maximum ONU response time determines max logical PON distance.

Default 0

LOS Alpha

Number of Loss-of-Signal occurrences to trigger an alarm.

Default 4

LOF Alpha

Number of Loss-of-Frame occurrences to trigger an alarm.

Default 4

LOAM Alpha

Number of loss-of-OAM occurrences to trigger an alarm.

Default 3

Scrambler

Default enabled

FEC Mode

Enables or disables forward error correction.

Default disabled

Auto Learn

Enable or disable password auto-learn mode.

Default enabled

Power Level

OLT power level. For the Broadlight 3000, values will be rounded down to one of 0, 3, or 6.

Default 0

Guard Bit Count

Number of guard bits for upstream transmission.

Default 32

DBA Mode

Dynamic Bandwidth Allocation (DBA) is specified in the ITU standard 984.3. This feature is used to grant upstream bandwidth to ONUs based on their demand and service-level agreement. The OLT will grant ONUs an increase in their slot time for more bandwidth while granting a reduced slot time to others. Through DBA, a GPON link can be oversubscribed for upstream traffic, and improve bandwidth usage efficiency.

Working mode values:

predictive

piggyback

wholeReport

Default predictive

GEM Block Size

Basic unit in bytes used by all ONUs for DBA reports of their queue occupancy (for piggyback and whole-reportDBA only)

Default 16

Upstream BER Interval

Interval for upstream bit error rate calculation.

Default 5000

Downstream BER Interval

Interval used for downstream bit error rate calculation.

Default 500

BER Signal Fail Threshold

Threshold is 10**(-N) for signal fail.

Default 3

BER Signal Degrade Threshold

Threshold is 10**(-N) for signal degrade.

Must exceed sf threshold.

Default 5

FEC Request

Indicates whether OLT turns on FEC indication for all Alloc-Id in the Upstream Bandwidth Map.

Default Disabled

Key Exchange

Specifies whether Single Key exchange should be performed during ONU activation process.

Default disabled

Min RT Propagation Delay

If the closest ONU location is known, the GPON stack uses this value in order to limit the size of the quiet zone.

Default 0

Min ONU Response Time

GPON stack uses this value in order to limit the size of the quiet zone.

Default 10

EQD measure Cycle

Defines the number of measurement cycles in the Ranging process.

Default 5

Drift Control Interval

Defines the interval of periodic monitoring on drifts of upstream data.

Default 1000

Drift Control Limit

Indicates the limit of upstream data drift.

Default 3

Alloc Cycle Length

Alloc-ID assignment map cycle length.

Default 2

Min Upstream Alloc

Size of minimal upstream allocation per frame.

Default 16

Ack Timeout

Timeout length of Acknowledge message.

Default 2000

PLS Max Alloc Size

Indicates a size of unassigned allocation that should be attached to the end of ranging window.

Default 120

DBA Cycle

The Dynamic Bandwidth Allocation (DBA) cycle determines the DBA interval size. Its an integer multiplicand of 2 mili-seconds. The range of values for the DBA cycle can be between 2ms-10ms.

Default

2 ms

SR-DBA Block Size

For DBA of SR type, the block size defines the resolution of the status reports per PON link.

Default

48 bytes.

Protect. Switchover Timer

If the system receives a LOS alarm for a link in Active state, the link state  changes to Switch Over Pending state. If the actual switch-over does  not happen after this Protect. Switchover Timer expires, the link will go back to Active state.

BIP Error Monitoring

Disable or enable the BIP error monitoring.

Values:

disabled The BIP error monitoring feature is disabled.

monitorOnly Monitor BIP errors. When ONU crosses the BIP error threshold, trigger a local alarm and send trap to the Network Management System.

blockOnError Monitor BIP errors. When ONU crosses the BIP error threshold, trigger a local alarm , send trap to the Network Management System, disable ONU ranging and set ONU line status to DSA (i.e. disabled).

Default: monitorOnly

BIP Errors Per Sample Threshold

If the number of BIP errors per sample exceeds this threshold, it is counted as an errored sample.

Default: 100

BIP Errored Samples Threshold

If the number of errored samples exceed this sample threshold, report and disable the onu if in blockOnError mode, otherwise simply report the threshold as being exceeded.

Default: 10

BIP Max Sample Gap

If two adjacent errored samples were taken farther apart than this threshold, do not count the earlier sample as an errored sample. This value is in the unit of seconds.

Default: 10

 

April 3, 2012