OLT Probable Cause
This section describes alarm causes, locations, and conditions for Optical LAN OLTs. The table below provides a list of OLT/NMS, EMS probable cause alarms, affected components, and a description of the alarm condition.
OLT Components - Alarm Probable Causes and Descriptions (Page 1 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms |
TL1/SNMP Condition Type |
Equipment | Condition Description |
| Access Violation (equipment alarm) |
EQPT | ETH-ACCESS | Tellabs ONT | Eth-ACCESS - Indicates that an Ethernet port has been locked out due to an Access Violation. The system has the ability to detect a number of abnormal conditions on ONT ports to trigger an alarm and can optionally disable the port. Access Violations:
|
| aIS (communications alarm)
|
ONT RDI | AIS | Tellabs ONT | RDI (Remote Defect Indication) - Generated when the GPON card receives a remote defect indication (RDI) in the upstream physical layer operations (PLO) from the ONT. Cleared when the GPON card detects that the condition has been resolved. |
| batteryFailure (equipment alarm) | ONT Battery Failure | PS-FAIL | Tellabs ONT | Battery Failure - ONT battery backup system (BBS) has detected that the battery has failed and should be replaced. |
| batteryMissing (equipment alarm) | ONT Battery Missing | PS-MISS | Tellabs ONT | Battery Missing - ONT BBS has detected that the battery is missing. |
| commercialPowerFailure (equipment alarm) | ONT AC Power Failure | ACPWR-LOS | Tellabs ONT | ONT on Battery - ONT BBS has detected that the ONT is operating on battery power. |
| temperature WarningONT (equipment alarm) | EQPT | EQPT, TEMP-WARNING | Tellabs ONT | ONT Temperature Warning - ONT has exceeded temperature limits. |
| temperatureHigh ONT (equipment alarm) |
ONT Temp High | EQPT, TEMP-HIGH | ONT Temperature High - ONT temperature is high. |
OLT Components - Alarm Probable Causes and Descriptions (Page 2 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| connectionEstablishment Error (equipment alarm) |
Communications Failure |
CONTCOM | ESU, QOIU |
Communications cannot be established with the equipped card. |
| ONT_RXPWR_HIGH | Consolidated ONT Video-Over-load | VIDEO-OVERLOAD-ONT | Tellabs ONT | ONT RX Power is high. |
| ONT_RXPWR_LOW | Consolidated ONT Video-Signal Degraded | VIDEO-SD-ONT | Tellabs ONT | ONT RX power is low. |
| coolingFanFailure (equipment alarm) | EQPT | CLFAN | EFA, OFA | The cooling fan has failed. |
| OntFanFailure | EQPT | ONT-CLFAN | Tellabs ONT | The ONT fan has failed |
| CSRV-RCV-DNAME (communications alarm) |
SIP Config Server Retrieving-Cannot resolve domain name |
CSRV-RCV-DNAME | Tellabs ONT | Config Server Retrieving - Cannot resolve domain name: ONT is configured for softswitch (TConfig), and it cannot resolve the domain name of the provisioned TConfig server. Either the domain name does not exist, or the TConfig server is down. |
| CSRV-RCV-MALF-CONF- DOC (communications alarm) |
SIP Config Server Retrieving-Mal- formed configu- ration document |
CSRV-RCV-MALF-CONF- DOC | Tellabs ONT | Config Server Retrieving - Malformed configuration document: ONT is configured for softswitch (TConfig), and it has received a malformed configuration document from the TConfig server. |
| CSRV-RCV-NOT-AUTH (communications alarm)
|
SIP Config Server Retrieving-Cannot authenticate | CSRV-RCV-NOT-AUTH | Tellabs ONT | Config Server Retrieving - Cannot authenticate: ONT is configured for softswitch (TConfig), and it failed to authenticate with the TConfig server. ONT requested the username/password from TConfig, but TConfig did not acknowledge the request, or TConfig did not return a profile. |
| CSRV-RCV-SRV-RSPFAIL (communications alarm) |
CSRV-RCV-SRV- RSPFAIL |
Tellabs ONT |
Config Server Retrieving - Server failure response: ONT is configured for softswitch (TConfig), and it has received a failure response from the TConfig server. |
|
| CSRV-RCV-TIMEOUT (communications alarm) |
SIP Config Server Retrieving-time- out | CSRV-RCV-TIMEOUT | Tellabs ONT | Config Server Retrieving - timeout: ONT is configured for softswitch (TConfig), and it has initiated an HTTP request for its profile (from TConfig), but the transaction has timed out. |
OLT Components - Alarm Probable Causes and Descriptions (Page 3 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| degradedSignal (communications alarm) | Degraded Signal | LPR | Uplink Ethernet port (EP) on ESU (ESU to Network) | The optical power level is lower than the threshold. |
| Downlink EP on ESU (ESU to IO) | ||||
| Uplink EP on MDS IO slot (IO to ESU) | ||||
| Tellabs ONT |
LOPL-LPR (ONT BER Maintenance - Signal Degraded): Indicates a degraded signal from an ONT. Generated when the upstream bit error rate (BER) for an ONT becomes greater than or equal to the BER maintenance threshold. Cleared when the upstream BER for the ONT becomes less than the BER maintenance threshold. | |||
| Tellabs ONT | LOPL-RFV-LPR (RF Video Signal Degraded) - Generated when the ONT detects that the optical signal power level is below the provisioned lower video threshold. | |||
| demodulationFailure (communications alarm) |
ONT LOPL OAML | LOPL-OAML | Tellabs ONT | LOPL-OAML (Loss of PLOAM) - Indicates a loss of physical layer operations administration and maintenance (PLOAM) cells from the ONT. The GPON card sends a request to the ONT. Generated when three consecutive PLOAM messages are missing (in response to the GPON card request). Cleared when the GPON card receives a PLOAM message (in response to its request) and the ONT is in the operating state. |
| DHCP-SRV-INCMPLTRESP (communications alarm)
|
SIP DHCP Server- Incomplete Response | DHCP-SRV- INCMPLTRESP | Tellabs ONT | DHCP server - Incomplete Response: ONT’s dynamic host configuration protocol (DHCP) client has acquired an incomplete IP configuration from the DHCP server. The IP configuration includes these components: IP address, subnet mask, network gateway, domain name, DNS servers, host name, and fully qualified domain name. Note: Alarm is not generated if the DHCP server is unable to provide the host name or fully qualified domain name. |
OLT Components - Alarm Probable Causes and Descriptions (Page 4 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms |
TL1/SNMP Condition Type |
Equipment | Condition Description |
| DHCP-SRV-NORESP (communications alarm)
|
SIP DHCP server-No Response or Error Received | DHCP-SRV-NORESP | Tellabs ONT | DHCP server - No Response or Error Received: ONT’s dynamic host configuration protocol (DHCP) client cannot acquire any IP configuration information from the DHCP server. The IP configuration includes these components: IP address, subnet mask, network gateway, domain name, DNS servers, host name, and fully qualified domain name. Note: Alarm is not generated if the DHCP server is unable to provide the host name or fully qualified domain name. |
| ONTIntrusion (equipment alarm) |
EQPT |
ONT-INTRUSION |
Tellabs ONT |
ONT-INTRUSION - Indicates that the wall mounted ONT has been removed from the wall. The alarm is cleared when the ONT is placed back into the alarm and the pressure switch is once again pressed in |
| excessiveResponseTime (equipment alarm) |
ONT LOPL LOA | </p> | Tellabs ONT |
LOPL-LOA (Loss of Acknowledgment) - Indicates a loss of acknowledgment from an ONT. The GPON card sends a set of downstream messages that require an upstream acknowledgment. Generated when the GPON card does not receive the required upstream acknowledgment from the ONT. Cleared when the GPON card receives the ONT acknowledgment. |
| framingError (communications alarm) |
ONT LOPL CPE | LOPL-CPE | Tellabs ONT | LOPL-CPE (Channel Phase Error) - Indicates a channel phase error on an ONT. The OLT monitors the upstream drift of window for each ONT. When the OLT detects that the upstream drift of window is equal to or greater than the allowed threshold, the OLT attempts to correct the ONT transmission phase error. Alarm is generated when the ONT transmission continues to drift after the OLT has attempted to correct the problem. Alarm is cleared when the GPON card receives a transmission in the expected position following activation. |
| gigePortFailure (equipment alarm) |
Gigabit Ethernet Physical Layer Failure | GIGE-PHY-FAIL | Tellabs ONT | Generated when there is a GbE physical layer failure. |
OLT Components - Alarm Probable Causes and Descriptions (Page 5 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| GponAlarmLossOfSignal (communications alarm) | PON LOS | PON-LOS | GPON card | PON-LOS - Indicates a loss of signal from all active ONTs on the GPON card port (i.e., the LOPL-LOS alarm is detected on all active ONTs). For example, this alarm occurs when the GPON facility fiber is unplugged from the GPON card. However, if all ONTs on the GPON port are in the pre-provisioned status, this alarm is not generated. Alarm is cleared when at least one upstream transmission is received on the GPON port. |
| GponTransmitterFailure | EQPT | XMT-FAIL | GPON card | XMT-FAIL |
| LacpGrpFail | LACP Group Failure | LACPGRPFAIL | LACP Group Failure |
|
| LoplLossOfSignal (communications alarm) | ONT LOPL LOS | LOPL-LOS | Tellabs ONT | LOPL-LOS - Generated when the ONT fiber fails; indicates a loss of signal from an individual ONT. The GPON card expects an optical signal, but it has not received a valid optical signal during four sequential upstream frames. Alarm is cleared when the ONT is successfully ranged and the GPON card receives a valid optical signal. Note: This alarm is not generated when the ONT status is pre-provisioned. |
| lossOfFrame (communications alarm) |
ONT LOPL LOF | LOPL-LOF | Tellabs ONT | ONT LOPL LOF - Generated when the GPON card receives four consecutive invalid delimiters from an ONT. Cleared when the GPON card successfully receives frame delineation from the ONT and the ONT is in the operating state. |
| ONTlossOfMultiFrame (communications alarm) | ONT LOPL LCD | LOPL-LCD | Tellabs ONT | LOPL-LCD (Loss of Channel Delineation) - Generated when the GPON card is unable to delineate the G-PON encapsulation mode (GEM) channel from the ONT for three consecutive frames. Cleared when the GPON card successfully receives GEM channel delineation from the ONT. |
OLT Components - Alarm Probable Causes and Descriptions (Page 6 of 10)
|
OLT/NMS Probable Cause |
EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| lossOfSignal (communications alarm) |
LOS | LOS | Uplink Ethernet port (EP) on ESU (ESU to Network) | Optical fiber failure at the ESU SFP failure, or ESU detects a failure on QOIU link. |
| Downlink EP on ESU (ESUto IO) | ||||
| Uplink EP on MDS IO slot (IO to ESU) | ||||
| Downlink EP on QOIU | ||||
| TDU clock input (timing server or timing client) | The TDU timing server has lost one of its composite clock inputs, or the TDU timing client has lost its incoming timing stream from the central office. | |||
| Tellabs ONT | LOPL-RFV-LOS (RF Video LOS) - Generated when the ONT has detected no signal at the RF video optical input. | |||
| lowinputvoltage (equipment alarm) |
EQPT |
LOW-VOLTAGE-INPUT | LOW-VOLTAGE-INPUT |
|
| lowBatteryThreshold (equipment alarm) |
ONT Battery Low | LWBATVG | Tellabs ONT | Low Battery - ONT BBS has detected that the battery voltage is low. |
| misc (misc-1 through misc-16) (equipment alarm)
|
MISC-1 through MISC-16 | Environment al contact (AMU) | Environmental alarm on the Alarm Maintenance Unit (AMU). | |
| OntLanAlarmLossOfSignal(communications alarm)
|
ONT LAN LOS | ONT-LAN-LOS | Tellabs ONT | Generated when an ONT Ethernet link to a subscriber goes down. |
| ONTMoCALossOfLink | ONT MoCA Loss of Link (LOL) | MOCA-LOL | Tellabs ONT | |
| ONTMoCALimitedLink | ONT MoCA Limited Link (LL) | MOCA-LTD-LNK | Tellabs ONT | |
| overloadSignal (equipment alarm) |
LOPL-RFV-OVLD | LOPL-RFV-OVLD | Tellabs ONT | LOPL-RFV-OVLD (RF Video Overload) - Generated when the ONT detects that the optical signal power level is above the provisioned upper video threshold. |
OLT Components - Alarm Probable Causes and Descriptions (Page 7 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| powerProblem (equipment alarm)
|
EQPT | PWR | Tellabs ONT | PowerProblem - This Alarm is signaled when the ESU detects that one of the two power alarm leads on the backplane is not within the nominal range of -56V to -42.5V. This may indicate that power is not attached to one of the backplane leads or that a rectifier or AC power supply has failed. The alarm clears when power is back within the specified nominal range. |
| PoE usage threshold (equipment alarm) |
PoE Usage Threshold | TCA-POE-USAGE | TCA-POE-USAGE - Generated when the ONT reaches the threshold usage limit. | |
| powerSupplyFailure (equipment alarm) |
ONT Dying Gasp | DYING GASP | Tellabs ONT | LOPL-DG (Dying Gasp) - Generated when the GPON card receives a dying gasp (DG) message from the ONT. Cleared when the GPON card receives a physical layer operations administration and maintenance (PLOAM) message during the ranging process. Note: Other ONT alarms are not reported when this alarm is active. |
| receiveFailure (communications alarm) | ONT LOPL SF | LOPL-SF | Tellabs ONT | LOPL-SF (Signal Failure) - Generated when the upstream bit error rate (BER) for the ONT becomes greater than or equal to the configured BER failure threshold. Cleared when the upstream BER for that ONT becomes less than the BER failure threshold. |
| replaceableUnitMissing (equipment alarm) | Missing Card | REPLUNITMISS | Redundant ESU, QOIU, TDU, AMU | This alarm is suppressed for a provisioned slot until a card has been equipped and subsequently removed from the slot. When an equipped card is removed, this alarm is reported. |
| replaceableUnitProblem (equipment alarm) | ONT LOPL PEE | LOPL-PEE | Tellabs ONT | LOPL-PEE (Physical Equipment Error) - Generated when a physical equipment error is detected on the ONT. |
| OSCPResponder | OCSP Responder Failed | SECURITY | OCSP-FAILED | |
| ponOnProtect | PON | PON-ON-PROTECT | PON-ON-PROTECT | |
| ponRevertFailed | PON | PON-REVERT-FAILED | PON-REVERT-FAILED |
OLT Components - Alarm Probable Causes and Descriptions (Page 8 of 10)
| NE/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| ponUnexpectedONT | PON | PON-UNEXPECTED ONT | PON | PON-UNEXPECTED-ONT - The PON Unexpected ONT will be an alarm that will be posted to the system when the system is configured to quarantine new ONTs on the PON. It is expected that the user will manually provision the ONT. The alarm will be cleared when the user manually configures the ONT serial number on the PON. The alarm text will call out the unexpected ONT(s). |
| ponUpstreamBW | PON | PON-BW-TCA-UP | PON | PON Upstream Bandwidth TCA - There will be an alarm posted to the system when the total traffic over the PON in a given direction exceeds a pre-provisioned threshold |
| ponDownstreamBW | PON | PON-BW-TCA-DN | PON | PON Downstream Bandwidth TCA - There will be an alarm posted to the system when the total traffic over the PON in a given direction exceeds a pre-provisioned threshold. |
| ponUpstreamOversubsc- ription | PON CIR | PON-CIR-OVERSCRIPTIO N UPSTREAM | PON | PON CIR Upstream Oversubscription - The Alarm will occur when the user has provisioned the system such that the total of all CIR (Committed Information Rates) configured on the PON exceeds the PON bandwidth. This will inform the user that they need to use a smaller CIR or split the PON as it will allow no bursting of UBR traffic on the PON. |
| ponDownstreamOversu- bscription | PON CIR | PON-CIR-OVERSUBSCRIP TION DOWNSTREAM | PON | PON CIR Downstream Oversubscription - Alarm will occur when the user has provisioned the system such that the total of all CIR (Committed Information Rates) configured on the PON exceeds the PON bandwidth. This will result in a new alarm "PON CIR Oversubscribed". This will inform the user that they need to use a smaller CIR or split the PON as it will allow no bursting of UBR traffic on the PON. |
| replaceableUnitTypeMis match (equipment alarm)
|
Mismatched Equipment Alarm | MEA | Redundant ESU, QOIU, TDU, AMU | The equipped card does not match the expected (provisioned) card for that slot. |
| Tellabs ONT | MEA (Mismatched Equipment Alarm) - Generated when an ONT is ranged with a mismatched or invalid ONT type. The supported ONT type does not match the provisioned ONT type, or the ONT is ranged with an invalid (unsupported) ONT type. Cleared when the provisioned ONT type matches the ranged ONT. |
OLT Components - Alarm Probable Causes and Descriptions (Page 9 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| sfwrDownloadFailure (equipment alarm) |
SDF | Tellabs ONT | Indicates a software download failure. It is generated when the GPON card fails to successfully upgrade the ONT. Cleared when the OLT system successfully upgrades the ONT. |
|
| SIPUA-REG-CANNOT-AUTH (communications alarm) |
SIP UA REGISTER-Cannot authenticate
|
SIPUA-REG-CANNOT- AUTH | Tellabs ONT | SIP UA REGISTER - Cannot authenticate - ONT is configured for softswitch (TConfig). SIP user agent (UA) has attempted a REGISTER procedure with the softswitch, but SIP UA failed to authenticate with the SIP registrar. |
| SIPUA-REG-DNAME (communications alarm)
|
SIP UA REGISTER-Cannot resolve domain name | SIPUA-REG-DNAME | Tellabs ONT | SIP UA REGISTER - Cannot resolve domain name - ONT is configured for softswitch (TConfig). SIP user agent (UA) has attempted a REGISTER procedure with the softswitch, but SIP UA cannot resolve the domain name of the SIP registrar. |
| SIPUA-REG-SRV-RSPFAIL (communications alarm)
|
SIP UA REGISTER-Server failure response
|
SIPUA-REG-SRV- RSPFAIL | Tellabs ONT | SIP UA REGISTER - Server response failure - ONT is configured for softswitch (TConfig). SIP user agent (UA) attempted a REGISTER procedure with the softswitch, but SIP UA detected an error with the response it received from the SIP registrar. |
| SIPUA-REG-TIMEOUT (communications alarm)
|
SIP UA REGISTER-timeout
|
SIPUA-REG-TIMEOUT | Tellabs ONT | SIP UA REGISTER - timeout - ONT is configured for softswitch (TConfig). SIP user agent (UA) attempted a REGISTER procedure with the softswitch, but SIP UA encountered a timeout condition while communicating with the SIP registrar. |
| ONT Startup Failure (s | ilure | INTSFT | Tellabs ONT | INTSFT (Startup Failure) - Indicates an ONT startup failure. It is generated when the ONT ranging has failed two times while the GPON card has received optical bursts from the ONT. Alarm is cleared when the ONT is successfully ranged. Note: This alarm is not generated when the ONT status is pre-provisioned. |
| Software Processing Error (softwareError) | SW Processing | SW-PROC-ERR | ||
| timingProblem (communication alarm) | Timing Fail | SYNCLOS | TDU (timing server or timing client) | The TDU timing server has lost one of its composite clock inputs, or the TDU timing client has lost its incoming timing stream from the Central Office. |
OLT Components - Alarm Probable Causes and Descriptions (Page 10 of 10)
| OLT/NMS Probable Cause | EMS Probable Cause Alarms | TL1/SNMP Condition Type |
Equipment | Condition Description |
| transceiverFailure (communications alarm) |
Transceiver Failure |
LOPL-XCV |
GPON card |
LOPL-XCV (Port Failure/Physical Failure) - Generated when the system detects that the GPON transmitter has failed. |
| Unavailable (communications alarm) |
EMS To OLT Communications Problem | EMSCOMMLOS | Network Element | EMS has detected that the network element communication link is down. |
| versionMismatch (equipment alarm) |
Version Mismatch | SWFTDWN | ESU, QOIU | SW Version Mismatch - This alarm is signaled when the system has detected that auto download has failed two or more times to download a card or ONT within the system with the provisioned version. The alarm is cleared when the system detects that the card or ONT is running the provisioned software version. |
| VIDEO-LOS-ONT (communications alarm) |
ONT Video LOS | VIDEO-LOS-ONT | Tellabs ONT | Generated when the video (including head end failures) fails at the 1550 wave length to at least one active ONT (but not all the active ONTs on a given PON port). |
| VlanProvError | No VLAN Egress Provisioned | VLAN-PROV-ERROR | VLAN-PROV-ERROR - VLAN does not appear on an uplink and cannot access the network |
FEEDBACK: Are you happy with this material?
Thank you Your feedback helps us to continually improve our content.