name: T323
full_form: Timer 323
context: 5.3.4.3.4.1 Network rejection of in-call modification If the network cannot support the change to the requested call mode or if the change of the channel configuration fails the network shall: release the resources which had been reserved for the alternation: send a MODIFY REJECT message with the old bearer capability and with cause # 58 "bearer capability not presently available" to the initiating mobile station; and enter the "active" state. If the change of the channel configuration fails, the network shall return to the internal resources required for the old call mode. Upon receipt of the MODIFY REJECT message with the old bearer capability the initiating mobile station shall: stop timer T323; release any resources which had been reserved for the alternation; resume sending user channel information according to the present call mode; resume interpreting received user channel information according to the present call mode; and enter the "active" state. 5.3.4.3.4.2 Mobile station rejection of in-call modification If the mobile station cannot support the change to the requested call mode, the mobile station shall: stop timer T324; release any resources which had been reserved for the alternation; send a MODIFY REJECT message with the old bearer capability and cause # 58 "bearer capability not presently available", and enter the "active" state. Upon receipt of the MODIFY REJECT message the network shall: stop timer T323, release any resources which had been reserved for the alternation. 5.3.4.3.4.3 Time-out recovery Upon expiration of T323 in either the mobile station or the network the procedures for call clearing shall be initiated (see subclause 5.4) with cause # 102 "recovery on timer expiry". Upon expiration of T324 the mobile station shall: release any resources which had been reserved for the alternation; send a MODIFY REJECT message with the old bearer capability and cause #58 "bearer capability not presently available"; and enter the "active" state.
description: T323 is a timer used in the context of in-call modification procedures within mobile communication networks. It is utilized by both the network and the mobile station to manage the timing of call mode changes, resource allocation, and error recovery. The expiration of T323 triggers specific actions aimed at recovering from potential failures or timeouts during these modifications, including the initiation of call clearing procedures with a specified cause code.
explanation: T323 is classified as a Timer because it is specifically used to manage time-related aspects of in-call modification procedures, dictating when certain actions should be taken by both the network and mobile stations. Its primary function is to ensure that these modifications are handled within a timely manner, preventing indefinite waits or resource locks.
section_title: 5.3.4.3.4 Failure of in-call modification
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biotag_Description: B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O