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GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

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Page 668<br />

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

21.9.4 Macro Control_Tracing_HLR<br />

The Control_Tracing_HLR macro may be invoked in the HLR, if subscriber related activity is detected. If<br />

the tracing is active in the HLR and not active in the VLR, the MAP_ACTIVATE_TRACE_MODE request is<br />

sent to the VLR.<br />

The MAP_ACTIVATE_TRACE_MODE confirmation from the VLR is processed as follows:<br />

- if the primitive contains a successful acknowledge, the tracing in VLR is set active;<br />

- if the primitive contains errors, the tracing in VLR is set deactive.<br />

The Control_Tracing_HLR macro is shown in the figure 21.9/4.

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