7 Interaction with other services

22.1353GPPMulticallRelease 17Service descriptionStage 1TS

7.1 Line Identification

7.1.1 Calling Line Identification Presentation (CLIP)

No impact, i.e. CLIP shall be provided with all calls.

7.1.2 Calling Line Identification Restriction (CLIR)

No impact, i.e. CLIR shall be provided with all calls.

7.1.3 Connected Line Identification Presentation (COLP)

No impact, i.e. COLP shall be provided with all calls.

7.1.4 Connected Line Identification Restriction (COLR)

No impact, i.e. COLR shall be provided with all calls.

7.2 Call Forwarding

7.2.1 Call Forwarding Unconditional (CFU)

No impact.

7.2.2 Call Forwarding on Busy (CFB)

No impact.

NOTE: CFB shall be invoked when the network detects a NDUB condition. The maximum number of bearers available to the subscriber (N_br) affects the NDUB condition. For the NDUB definition specific for Multicall, see annex A.

This means that for the case of N_br = 1, the system behaviour shall be the same as for a subscriber who is not provided with the Multicall service.

7.2.3 Call Forwarding on No Reply (CFNRy)

No impact.

7.2.4 Call Forwarding on Not Reachable (CFNRc)

No impact.

7.3 Call Completion

7.3.1 Call Hold (CH)

No impact, i.e. it shall be possible to put an established speech call on hold.

Irrespective of whether the maximum number of CS bearers (N_br) is reached or not, and a terminating call is indicated to the user, she shall be able to accept the terminating call by applying the Call Hold service to an active speech call. By that she makes the bearer of the held call available to the new call.

NOTE 1: This means that for the case of N_br = 1, the system behaviour shall be the same as for a subscriber who is not provided with the Multicall service.

NOTE 2: There is no change to the maximum number of held calls allowed for the Multicall supplementary service. The maximum number of held calls is still 1 per a subscriber.

7.3.2 Call Waiting (CW)

When the subscriber has at least one ongoing call and a new terminating call is speech; then Call Waiting shall be invoked if:

1. there is an active speech call and Call Waiting is active and operative for speech or;
2. there is a held speech call, with no active call on the same bearer, and Call Waiting is active and operative for speech or;
3. there is a held speech call, with an active non-speech call on the same bearer, and Call Waiting is active and operative for that non-speech basic service or;
4. there are no speech calls (including a call on hold), the maximum number of bearers (N_br) has been reached and Call Waiting is active and operative for at least one of the basic services currently in use.

When the subscriber has at least one ongoing call and a new terminating call is not speech; then Call Waiting shall be invoked if the maximum number of bearers (N_br) has been reached and Call Waiting is active and operative for at least one of the basic services currently in use.

NOTE: There is no change to the maximum number of waiting calls allowed for the Multicall service. The maximum number of waiting calls is still 1 per a subscriber.

7.4 Multi Party (MPTY)

No Impact.

The number of MPTY member may be limited by N_cs_MO, N_cs_MT and N_cs.

7.5 Closed User Group (CUG)

No impact.

7.6 Advice of Charge (AoC)

The subscriber shall receive the AoC indication individually for each CS call.

For the AoCC service, the ACM (Accumulated Call Meter as defined in TS 22.024) shall reckon the sum of the charge generated by all simultaneous CS calls.

7.7 Call Barring

No impact.

7.7.1 Barring of all outgoing calls

No impact.

7.7.2 Barring of outgoing international calls

No impact.

7.7.3 Barring of outgoing international calls except those directed to the HPLMN country

No impact.

7.7.4 Barring of all incoming calls

No impact.

7.7.5 Barring of incoming calls when roaming

No impact.

7.8 Explicit Call Transfer (ECT)

No impact.

7.9 Completion of Call to Busy Subscriber (CCBS)

The definition of the IDLE state of subscriber A and destination B is not modified, i.e. a subscriber is considered to be IDLE when all the bearers (calls) for her have been released.

A subscriber to whom CCBS can be invoked shall be regarded as NDUB under the specific NDUB condition for Multicall (See Annex A).

7.10 Multiple Subscriber Profile (MSP)

No impact. The Multicall supplementary service shall be provisioned on a per subscriber basis. Nbr_SN, Nbr_SB, and Nbr_user shall apply over all profiles.

7.11 Calling Name Presentation (CNAP)

No impact.

7.12 User-to-User Signalling (UUS)

No Impact

7.13 enhanced Multi-Level Precedence and Pre-emption service (eMLPP)

No impact.

7.14 Call Deflection (CD)

No impact.