13.6.1 Principles

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

The procedures specified for the Call Hold supplementary service in 3GPP TS 23.205 [2] clause 13.6 for BICC based CS Core Network and in 3GPP TS 23.231 [3] clause 13.6 for SIP-I based CS Core Network shall be followed with the following modifications:

– The call establishment and call clearing procedures defined in clauses 6 and 7 shall be applied.

– If a new call is established after the original call is held, the MSC shall generate a new GCR for the new call.

The following clauses describe the additional requirements related to the LCLS functionality when the Call Hold supplementary service is activated for the locally switched call.