Section: 5.3.5.3 Rejection of service level up- and downgrading
Content: If a change of bearer service is requested together with a change of the "maximum number of traffic channels" and/or the "wanted air interface user rate", or if the current used service is not a data service where up- and downgrading is applicable, or if the receiver chooses not to grant the request, the network shall: - send a MODIFY REJECT message with bearer capability negotiated at call setup and with cause #58 "bearer capability not presently available"; - enter the "active" state. Upon receipt of the MODIFY REJECT message with the bearer capability negotiated at call setup, the mobile station shall: stop timer T323 and enter the "active" state.