only the CS paging related to the mobile which is in packet transfer mode will be sent onto its PACCH.
When a CS PAGING is receive during PTM, the PS transfer is stopped (paused), the call is answered, and after all release, the packet transfer will be resumed.
The PS paging is sent over the BCCH, when MS in IDLE MODE. During a CS call, the PS PAGING is **usually** not decoded by the MS. Yet some MS’s are able to listen to the BCCH while in CS call, in order to fully support DTM, but that’s recent and rare.
That’s NMO 1.