---
oid: "1.3.6.1.4.1.2011.6.144.1.1.18.1.5"
asn1-notation: "{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 2011 huaweiUtility(6) hwVOPGlobalModule(144) hwVOPObjects(1) hwVOPProfiles(1) hwVOPVirtualNoiseConfProfTable(18) hwVOPVirtualNoiseConfProfEntry(1) hwVOPVirtualNoiseConfProfTxRefVnUs(5)}"
description: "hwVOPVirtualNoiseConfProfTxRefVnUs OBJECT-TYPE"
classification: "MIB object for network management"
last-modified: "2022-10-11"
---

## OID : `1.3.6.1.4.1.2011.6.144.1.1.18.1.5`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 2011 huaweiUtility(6) hwVOPGlobalModule(144) hwVOPObjects(1) hwVOPProfiles(1) hwVOPVirtualNoiseConfProfTable(18) hwVOPVirtualNoiseConfProfEntry(1) hwVOPVirtualNoiseConfProfTxRefVnUs(5)}
```

### Description

```asn1
hwVOPVirtualNoiseConfProfTxRefVnUs OBJECT-TYPE
SYNTAX Xdsl2LineTxRefVnUs
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This configuration parameter defines the upstream transmitter referred virtual noise.
The TXREFVNus shall be specified through a set of breakpoints.
Each breakpoint shall consist of a subcarrier index t, with a subcarrier spacing of 4.3125 kHz,
and a noise PSD level (expressed in dBm/Hz) at that subcarrier.
The set of breakpoints can then be represented as: [(t1, PSD1), (t2, PSD2), ... , (tN, PSDN)].
16 groups can be configured at most, and 3 bytes for each group. The first two bytes represent tone index,
the 3th byte represents the configured PSD value. The relation between configured PSD value and real PSD
value is: REAL PSD = (CONFIGURED PSD + 80) * (-0.5dBm/Hz)."
REFERENCE
"ITU-T G.997.1, paragraph #7.3.1.7.4 (TXREFVNus)"
```

**Classification**: MIB object for network management

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