All MIBs › ACD-SFP-MIB › acdSfpThreshRxPwrLowAlm
acdSfpThreshRxPwrLowAlm
Module: ACD-SFP-MIB
OID (symbolic): ACD-SFP-MIB::acdSfpThreshRxPwrLowAlm
OID (numeric): 1.3.6.1.4.1.22420.2.4.3.1.20
Node type: OBJECT-TYPE
Type: Unsigned32
Access: read-only
Description: Low Alarm RX input power in mW. Represented as a 16 bit unsigned integer with the power defined as the full 16 bit value (0 to 65535) with LSB equal to 0.1 micro-Watt, yielding a total range of 0 to 6.5535 mW (~ -40 to +8.2 dBm).
What is acdSfpThreshRxPwrLowAlm?
This OID defines the low alarm threshold for received optical power, alerting when the incoming signal is too weak to maintain reliable communication (0–6.5535 mW range). A receiver below this threshold cannot decode packets reliably, causing link instability; early detection allows intervention. For instance, a threshold of 500 (0.05 mW or -13 dBm) alarms when the far end's signal is attenuated below receivable levels due to bad fiber, dirty connectors, or failing optics.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.22420.2.4.3.1.20 snmpwalk -v2c -c public <target> ACD-SFP-MIB::acdSfpThreshRxPwrLowAlm
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.22420.2.4.3.1.20.1 snmpget -v2c -c public <target> ACD-SFP-MIB::acdSfpThreshRxPwrLowAlm.1
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OID Breakdown
Upper-level ancestors (8 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.22420 | accedianMIB | ACCEDIAN-SMI |
| 1.3.6.1.4.1.22420.2 | acdMibs | ACCEDIAN-SMI |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.22420.2.4 | acdSfp | ACD-SFP-MIB |
| 1.3.6.1.4.1.22420.2.4.3 | acdSfpThreshTable | ACD-SFP-MIB |
| 1.3.6.1.4.1.22420.2.4.3.1 | acdSfpThreshEntry | ACD-SFP-MIB |
| 1.3.6.1.4.1.22420.2.4.3.1.20 | acdSfpThreshRxPwrLowAlm | ACD-SFP-MIB |