All MIBs › Nortel-MsCarrier-MscPassport-TdmaIwfMIB › mscTdmaCsV42T401AckTimer
mscTdmaCsV42T401AckTimer
Module: Nortel-MsCarrier-MscPassport-TdmaIwfMIB
OID (symbolic): Nortel-MsCarrier-MscPassport-TdmaIwfMIB::mscTdmaCsV42T401AckTimer
OID (numeric): 1.3.6.1.4.1.562.36.2.1.135.7.10.1.2
Node type: OBJECT-TYPE
Type: FixedPoint2
Access: read-write
Description: This attribute specifies the maximum amount of time that the IWF waits for an acknowledgment before retransmitting a frame. Since information about the T401 timer is not carried in the Exchange Identification (XID) negotiations at call setup time, both sides operate with different timer values. The value for T401 depends on many factors, such as propagation delay or frame processing time. A frame is retransmitted up to N400 times if the timer T401 expires before an acknowledgment for a frame is actually received. The performance of the data link layer can be impacted by the value of this timer as retransmissions of frames occur on expiry of timer T401. Changes to this attribute do not affect existing calls.
What is mscTdmaCsV42T401AckTimer?
A read-write timer (50-900, fixed-point, default 400) specifying how long the IWF waits for an acknowledgment before retransmitting a V.42 data link frame; frames are retransmitted up to N400 times if T401 expires without an ACK, so this timer's value directly affects the data link's retransmission behavior and throughput under loss. Since T401 isn't negotiated during call setup, each side can run a different value, and changes only affect new calls, not calls in progress.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.562.36.2.1.135.7.10.1.2 snmpwalk -v2c -c public <target> Nortel-MsCarrier-MscPassport-TdmaIwfMIB::mscTdmaCsV42T401AckTimer
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.562.36.2.1.135.7.10.1.2.1 snmpget -v2c -c public <target> Nortel-MsCarrier-MscPassport-TdmaIwfMIB::mscTdmaCsV42T401AckTimer.1
Set instance 1 (SNMPv2c):
snmpset -v2c -c private <target> 1.3.6.1.4.1.562.36.2.1.135.7.10.1.2.1 s <value>
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OID Breakdown
Upper-level ancestors (10 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 |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.562 | nortel | CPM-NORTEL-MIB |
| 1.3.6.1.4.1.562.36 | msCarrier | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| 1.3.6.1.4.1.562.36.2 | mscPassport | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| 1.3.6.1.4.1.562.36.2.1 | mscComponents | Nortel-MsCarrier-MscPassport-UsefulDefinitionsMIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.562.36.2.1.135 | mscTdmaCs | Nortel-MsCarrier-MscPassport-TdmaIwfMIB |
| 1.3.6.1.4.1.562.36.2.1.135.7 | mscTdmaCsV42 | Nortel-MsCarrier-MscPassport-TdmaIwfMIB |
| 1.3.6.1.4.1.562.36.2.1.135.7.10 | mscTdmaCsV42ProvTable | Nortel-MsCarrier-MscPassport-TdmaIwfMIB |
| 1.3.6.1.4.1.562.36.2.1.135.7.10.1 | mscTdmaCsV42ProvEntry | Nortel-MsCarrier-MscPassport-TdmaIwfMIB |
| 1.3.6.1.4.1.562.36.2.1.135.7.10.1.2 | mscTdmaCsV42T401AckTimer | Nortel-MsCarrier-MscPassport-TdmaIwfMIB |