13.2.1 General

23.2843GPPLocal Call Local Switch (LCLS)Release 17Stage 2TS

The procedures specified for the Call Deflection (CD) supplementary services in 3GPP TS 23.205 [2] clause 13.2 for BICC based CS Core Network and in 3GPP TS 23.231 [3] clause 13.2 for SIP-I based CS Core Network shall be followed. The following clauses describe the additional requirements related to the LCLS functionality.

The incoming call shall be offered to the served subscriber as a basic mobile terminated call as described in the first part of clause 6.3.2. If the Call Deflection (CD) supplementary service is active and a Call Deflection request from the served subscriber is accepted the call shall be forwarded towards the forwarded-to subscriber.

The basic call establishment procedures defined in Clause 6 shall be followed for the call towards the forwarded-to (deflected-to) subscriber. The MSC server shall release the call leg towards the served subscriber as described in the clause 7.1 for call clearing.