All MIBs › ADSL2-LINE-MIB › adsl2LineStatusSnrMarginDs
adsl2LineStatusSnrMarginDs
Module: ADSL2-LINE-MIB
OID (symbolic): ADSL2-LINE-MIB::adsl2LineStatusSnrMarginDs
OID (numeric): 1.3.6.1.2.1.10.238.1.1.1.1.18
Node type: OBJECT-TYPE
Type: Integer32
Access: read-only
Description: Downstream SNR Margin is the maximum increase in dB of the noise power received at the ATU-R, such that the BER requirements are met for all downstream bearer channels. It ranges from -640 to 630 units of 0.1 dB (physical values are -64 to 63 dB). A special value of 0x7FFFFFFF (2147483647) indicates the SNR Margin is out of range to be represented. A special value of 0x7FFFFFFE (2147483646) indicates the SNR Margin measurement is currently unavailable.
What is adsl2LineStatusSnrMarginDs?
This read-only OID reports the downstream noise margin in dB, ranging from −640 to 630 (−64 to 63 dB physical), representing how much additional noise the line can tolerate before errors appear. Technicians monitor this to forecast line stability: positive high margins (above 50) indicate robust connections, while low or negative margins mean the line will retrain or drop soon. For example, a margin of 60 (6 dB) is healthy; a value of −50 (−5 dB) warns that the line is about to lose sync and retrain.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.2.1.10.238.1.1.1.1.18 snmpwalk -v2c -c public <target> ADSL2-LINE-MIB::adsl2LineStatusSnrMarginDs
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.2.1.10.238.1.1.1.1.18.1 snmpget -v2c -c public <target> ADSL2-LINE-MIB::adsl2LineStatusSnrMarginDs.1
Start monitoring ADSL2/ADSL2+ DSLAMs and CPE modems with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ADSL2-LINE-MIB::adsl2LineStatusSnrMarginDs OID value, configure state conditions and alerts, and monitor any ADSL2/ADSL2+ DSLAMs and CPE modems from a single console.
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 |
| 1.3.6.1.2.1.10.238.1.1 | adsl2Line | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.1.1 | adsl2LineTable | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.1.1.1 | adsl2LineEntry | ADSL2-LINE-MIB |
| 1.3.6.1.2.1.10.238.1.1.1.1.18 | adsl2LineStatusSnrMarginDs | ADSL2-LINE-MIB |