CME GPP-3 Specifications download pdf (Page 161)

3GPP

3GPP TS 27.007 V6.3.0 (2003-

06)

Release 6

Annex F (informative):

Mobile terminated voice followed by data call example

Figure F.1 illustrates the possible transitions in MT BS 81 call. Responses and result codes generated by TA are in bold

face. In this example, data part of the call is asynchronous non-transparent 9600 bps service.

VOICEATD (or ATA)remote initiatedin-call modificationsuccessfulAT+CHUP(or ATHor drop DTR)remotehangupDATAremotehangup(V.24 circuit 109 ON)OFF-LINETA sets +CMOD=0AT+CLIP=1; +CR=1; +DR=1; +ILRR=1; +CRC=1OK+CRING: VOICE/REL ASYNC+CLIP: +35812345,145AT+CMOD=3; +FCLASS=0; AOFF-LINEsuccessOKconnection failureNO CARRIERAT+CEER+CEER: failure causeOKgeneral failureERRORin-call modification success+CR: REL ASYNC+DR: NONE+ILRR: 19200CONNECT 9600in-call modification failureERRORAT+CEER+CEER: failure causeOK+CR: REL ASYNC+DR: NONE+ILRR: 19200CONNECT 9600ATH(or AT+CHUP or drop DTR)OKOKNO CARRIERNO CARRIER

Figure F.1: MT BS 81 call

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