LCLS (Local Call Local Switch) provides the capability for the user plane to be locally switched (e.g. voice data in user plane is
not backhauled to the CS core network) for calls that are generated and terminated by users that are served by the same
BSS. The result is saving on transmission resource of the Abis and/or A interface.
LCLS shall only be considered for a CS voice call and is transparent to the end user.
LCLS may be supported on both TDM based A interface (AoTDM) and IP based A interface (AoIP).
LCLS may be implemented on both a BICC based CS core network and a SIP-I based CS core