name: T3421
full_form: Timer T3421
context: When the DETACH REQUEST message is received by the network, the network shall send a DETACH ACCEPT message to the UE, if the Detach type IE does not indicate "switch off". Otherwise, the procedure is completed when the network receives the DETACH REQUEST message.
  The network and the UE shall deactivate the EPS bearer context(s), if any, for this UE locally without peer-to-peer signalling between the UE and the MME.
  The UE is marked as inactive in the network for EPS services. The network shall enter the state EMM-DEREGISTERED.
  The UE, when receiving the DETACH ACCEPT message, shall stop timer T3421. Furthermore, if the UE is operating in PS mode of operation, or is operating in CS/PS mode of operation and supports S1 mode only then:
  -	If the detach procedure was performed due to disabling of EPS services, then the UE shall enter the EMM-NULL state.
  -	Otherwise, the UE shall enter the EMM-DEREGISTERED state.
  The UE operating in CS/PS mode 1 or CS/PS mode 2 of operation, and supporting A/Gb mode or Iu mode, shall further set the update status to U2 NOT UPDATED, disable the E-UTRA capability (see clauseÂ 4.5) and attempt to select GERAN or UTRAN access technology.
description: Timer T3421 is used by the UE in the context of the detach procedure. It is stopped when the DETACH ACCEPT message is received, indicating the completion of the detach process from the UE's perspective.
explanation: T3421 is categorized under Miscellaneous as it refers to a specific timer within the 3GPP standard but does not fit into other categories like protocols or interfaces.
biotag_Context: O,O,B-Message,I-Message,O,O,O,O,O,O,O,O,O,O,O,B-Message,I-Message,O,O,O,O,O,O,B-Message,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,I-Message,O,O,O,O,O,B-Device,O,O,O,B-Network,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,B-Device,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,I-Message,O,O,O,O,O,O,O,O,B-Device,O,O,O,B-Mode,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Mode,I-Mode,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,B-Device,O,O,O,B-State,O,O,O,O,B-Device,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Mode,I-Mode,O,B-Interface,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,B-Network,O,B-Network,O,O
biotag_Description: B-Parameter,I-Parameter,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,I-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O