Section: 4.7.2.1.2 Handling of READY timer in the MS in Iu mode and S1 mode
Content: The READY timer is not applicable for Iu mode in S1 mode. Upon completion of a successful GPRS attach or routing area updating procedure in Iu mode, the MS shall stop the READY timer, if running. Upon completion of a successful EPS attach or tracking area updating procedure, the MS shall stop the READY timer, if running. In Iu mode, an MS may indicate a READY timer value to the network in the ATTACH REQUEST and the ROUTING AREA UPDATE REQUEST messages. If a READY timer value is received by an MS capable of both Iu mode and A/Gb mode in the ATTACH ACCEPT or the ROUTING AREA UPDATE ACCEPT message, then the MS shall store the received value in order to use it at an intersystem change from Iu mode to A/Gb mode.