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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

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NULL<br />

US_Open_<br />

Transaction<br />

Receive_<br />

Open_<br />

Confirm<br />

OK<br />

Wait<br />

US_UNST'D_<br />

SS_NOTIFY_<br />

ind<br />

Start_USSD_<br />

VLR<br />

MAP_UNST'D_<br />

SS_NOTIFY_<br />

req<br />

MAP_<br />

DELIMITER_<br />

req<br />

Wait_for_<br />

ussdn_cnf_2<br />

Sheet 4<br />

OK<br />

Signal from local USSD<br />

application that it wishes<br />

to open a transaction<br />

MAP_OPEN_req<br />

MAP_DELIMITER_req<br />

Section 21.1<br />

Error, V1<br />

Set Error<br />

US_UNST'D_<br />

SS_NOTIFY_<br />

rsp<br />

NULL<br />

Local Err<br />

US_<br />

Release<br />

Err<br />

MAP_<br />

CLOSE_<br />

req<br />

NULL<br />

US_UNST'D_<br />

SS_REQUEST_<br />

ind<br />

Sheet 4<br />

Start_USSD_<br />

VLR<br />

OK<br />

MAP_UNST'D_<br />

SS_REQUEST_<br />

req<br />

MAP_<br />

DELIMITER_<br />

req<br />

Wait_for_<br />

ussdr_cnf_2<br />

Figure 19.9.3/1 (sheet 3 of 4)<br />

Page 535<br />

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

Arrows to left are to MSC,<br />

arrows to right are to USSD application<br />

unless otherwise stated.<br />

Receive_<br />

Open_<br />

ind<br />

Start_USSD_<br />

VLR<br />

MAP_<br />

CLOSE_<br />

req<br />

Set Error<br />

US_UNST'D_<br />

SS_REQUEST_<br />

rsp<br />

NULL<br />

OK<br />

Local Err<br />

Local Err<br />

From MSC<br />

Section 21.1<br />

Err<br />

MAP_<br />

CLOSE_<br />

req<br />

Error, V1<br />

OK, Err<br />

NULL

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