CallEventStartTimeStamp

Validations ASN.1 Parent Types

The timestamp gives the start of the call event.

The time is given in the local time of the Sender PMN (or Serving Network where this is not the Sender).  There must be a UTC Time Offset Code associated with the timestamp.

Note that local time is the local time at the location of the chargeable subscriber.  Where the location is not available, as in some call forwarding scenarios, this will be a notional ‘network local time’.

Note that this timestamp is, in most cases, the start of charging, e.g. the call answer time rather than the channel seizure time where the call is charged from answer time.

In the case of an intermediate or last partial record of the same GPRS Call (GPRS Context) the timestamp must be populated with the record start time and not the context start timestamp (see item PDP Context Start Timestamp for identification of GPRS context start time in each partial record).

Derivation: 

GSM item answerTime or seizureTime (3GPP TS 32.005).  This will normally be the equivalent of the start of charging or, where the call event is non chargeable, the equivalent point.

For WLAN network usage, translated into local time of the WLAN Hot Spot Location, item event-timestamp (RFC 2869).

Conditionality: 

Mandatory within groups

             MO Basic Call Information

             MT Basic Call Information

             GPRS Basic Call Information

Validations

Error Code	Context	Severity Level	Validation Description
10       20       30       100       101       200	MOC MTC GPRS   MOC MTC GPRS   MOC MTC GPRS   MOC MTC GPRS   MOC MTC GPRS   MOC MTC GPRS	Severe       Severe       Severe       Severe       Severe       Severe	Syntax error.       Value out of range.       Mandatory associated item UTC Time Offset Code missing.     Call event start timestamp after charge detail timestamp.     Call event start timestamp after charging timestamp.     Call Event Start Timestamp before the commercial roaming start date for the specific network service and the TAP file is not a test file.

 

CallEventStartTimeStamp ::= [APPLICATION 44] DateTime

Parent Types

GprsBasicCallInformation
MoBasicCallInformation
MtBasicCallInformation
Text extracted from GSMA TD57 standard