13.11 Call Barring Services

23.2053GPPBearer-independent circuit-switched core networkRelease 17Stage 2TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

13.11.1 Barring of outgoing calls

No impact.

13.11.2 Barring of incoming calls other than Anonymous Call Rejection

No impact.

13.11.3 Anonymous Call Rejection (ACR)

13.11.3.1 General

The Anonymous Call Rejection service is described in 3GPP TS 23.088 [46].

13.11.3.2 Anonymous Call Rejection by the GMSC

If the incoming call to the mobile station is determined to be barred by the Anonymous Call Rejection service, the call shall be barred. Otherwise the call shall be delivered as described in clause 6, Call Establishment.

If the call is to be rejected due to ACR the GMSC shall seize a MGW to connect the call to a recorded announcement as for existing barring procedures requiring a tone or announcement.

The GMSC shall include Cause No. 24 – Call rejected due to feature at destination in the CPG or ACM and then the GMSC server provides the MGW with the announcement identification and requests the MGW to notify the announcement completion using the Play Announcement procedure as described in clause 14.6.

After the announcement has been completed the GMSC server initiates the call release as described in the clause 7, with the cause 31 (normal, unspecified).