ACMIB :: isdnT203

MIB Reference — IPNetwork Monitor · Updated September 14, 2026

All MIBsACMIBisdnT203

isdnT203

Module: ACMIB

OID (symbolic): ACMIB::isdnT203

OID (numeric): 1.3.6.1.4.1.1751.2.18.5.11.2.1.3

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-write

Description: value of L2 T203 timer in seconds

What is isdnT203?

This OID sets the T203 idle timeout in seconds (1–60), which is the maximum time the Layer 2 link can remain idle before requiring an acknowledgment to keep it alive. If no traffic flows within this period, the link sends a probe message; too low a value causes unnecessary traffic, too high causes stale connections. A value of 30 means an idle link must see activity within 30 seconds.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.1751.2.18.5.11.2.1.3
snmpwalk -v2c -c public <target> ACMIB::isdnT203

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.1751.2.18.5.11.2.1.3.1
snmpget -v2c -c public <target> ACMIB::isdnT203.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.6.1.4.1.1751.2.18.5.11.2.1.3.1 i <value>

Start monitoring Lucent/Nortel Access Concentrator (legacy) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the ACMIB::isdnT203 OID value, configure state conditions and alerts, and monitor any Lucent/Nortel Access Concentrator (legacy) from a single console.

OID Breakdown

Upper-level ancestors (6 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
Numeric OIDNameModule
1.3.6.1.4.1.1751lucentACMIB
1.3.6.1.4.1.1751.2mibsACMIB
1.3.6.1.4.1.1751.2.18acMIBACMIB
1.3.6.1.4.1.1751.2.18.5intfConfigACMIB
1.3.6.1.4.1.1751.2.18.5.11isdnConfigACMIB
1.3.6.1.4.1.1751.2.18.5.11.2isdnL2ConfigTableACMIB
1.3.6.1.4.1.1751.2.18.5.11.2.1isdnL2ConfigEntryACMIB
1.3.6.1.4.1.1751.2.18.5.11.2.1.3isdnT203ACMIB