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GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

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A_SETUP<br />

`Set Timer<br />

T1'<br />

WAIT_FOR_<br />

_CALL_RSP<br />

A_CALL_<br />

_CONF<br />

`User<br />

Busy?`<br />

OK<br />

No<br />

A_ASS_REQ<br />

WAIT_FOR_<br />

_ASS_REQ<br />

Yes<br />

1<br />

A_REL_<br />

_COM<br />

'Error<br />

Cause 17?<br />

`Set User<br />

Error`<br />

OK<br />

Yes<br />

No<br />

MAP_COMPLETE_<br />

_CALL_ind<br />

Check_<br />

_Indication<br />

1<br />

Error Cause:<br />

#17 User Busy<br />

#21 Call Rejected<br />

+ others<br />

UE = Busy Subscriber UDUB<br />

MAP_COMPLETE_CALL_rsp<br />

MAP_DELIMITER<br />

Page 439<br />

<strong>GSM</strong> <strong>09.02</strong> <strong>Version</strong> <strong>5.3.0</strong>: August 1996<br />

See Section 21.2<br />

Figure 18.3/3 (sheet 1 of 2): Macro COMPLETE_CALL_IN<br />

Error<br />

2<br />

'T1 Timer<br />

Expiry'<br />

`Set UE = NO<br />

Subscriber<br />

Reply`

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