All MIBs › ADSL2-LINE-MIB › adsl2SCStatusSnr
adsl2SCStatusSnr
Module: ADSL2-LINE-MIB
OID (symbolic): ADSL2-LINE-MIB::adsl2SCStatusSnr
OID (numeric): 1.3.6.1.2.1.10.238.1.2.2.1.3
Node type: OBJECT-TYPE
Type: OCTET STRING
Access: read-only
Description: The SNR Margin per sub-carrier, expressing the ratio between the received signal power and received noise power per subscriber. It is an array of 512 octets, designed for supporting up to 512 (downstream) sub-carriers. The number of utilized octets on downstream direction depends on NSCds, and on upstream direction it depends on NSCus. This value is referred to here as NSC. Octet i (0 <= i < NSC) is set to a value in the range 0 to 254 to indicate that the respective downstream or upstream sub- carrier i has SNR of: (-32 + Adsl2SubcarrierSnr(i)/2) in dB (i.e., -32 to 95dB). The special value 255 means that no measurement could be done for the subcarrier because it is out of the PSD mask passband or that the noise PSD is out of range to be represented. Each value in this array is 8 bits wide.
What is adsl2SCStatusSnr?
This OID contains an array of per-subcarrier signal-to-noise ratios (up to 512 carriers) where each byte represents one carrier's SNR margin in 0.5 dB units. Engineers and diagnostic tools analyze this to identify which frequency bands have poor signal quality, presence of crosstalk, or RFI interference. Values of 50 or higher (25 dB margin) per carrier indicate good line health; values below 20 (10 dB) per carrier indicate vulnerable frequencies.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.10.238.1.2.2.1.3 snmpwalk -v2c -c public <target> ADSL2-LINE-MIB::adsl2SCStatusSnr
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.10.238.1.2.2.1.3.1 snmpget -v2c -c public <target> ADSL2-LINE-MIB::adsl2SCStatusSnr.1
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OID Breakdown
Upper-level ancestors (7 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 |
| 1.3.6.1.2 | mgmt | AXON-MIB |
| 1.3.6.1.2.1 | mib_2 | AXON-MIB |
| 1.3.6.1.2.1.10 | transmission | CHECKPOINT-MIB-2 |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.2.1.10.238 | adsl2MIB | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1 | adsl2 | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.2 | adsl2Status | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.2.2 | adsl2SCStatusTable | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.2.2.1 | adsl2SCStatusEntry | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.2.2.1.3 | adsl2SCStatusSnr | ADSL2-LINE-MIB |