---
oid: "1.3.6.1.4.1.29.1.5.1.4.1.1.2"
short-description: "vDS1ZeroCode OBJECT-TYPE"
last-modified: "2020-09-14"
parent-oid: "1.3.6.1.4.1.29.1.5.1.4.1.1"
---

## OID: `1.3.6.1.4.1.29.1.5.1.4.1.1.2`

```asn1
{iso(1) identified-organization(3) dod(6) internet(1) private(4) enterprise(1) 29 vitamanagement(1) vitatransmission(5) serialline(1) ds1(4) vDS1Table(1) vDS1Entry(1) vDS1ZeroCode(2)}
```

### Description

```asn1
vDS1ZeroCode OBJECT-TYPE
SYNTAX INTEGER {
other(1),
jammedbit(2),
hdb3(3),
intrinsic(4),
b8zs(5)}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"Specifies the method of zero code suppression
to be used as follows:
INTRINSIC: Long zero strings are never generated
and data bits are inverted, resulting in optimum
throughput. Similar to the HDLC mode offered by
some DSU vendors.
B8ZCS: Relies on bipolar violations.
JAMMED BIT: The eighth bit of each channel is
set to 1.
HDB3: Uses hdb3 zero compression."
```

**Classification:** MIB object for network management

### Child OIDs

No child OID

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