A.5.4 Call forwarding on not reachable (no response to paging/radio channel failure)

3G security3GPP43.033Lawful InterceptionRelease 13Stage 2TS

Call forwarding on not reachable because of no response to paging or radio channel failure is also handled on the MSC/VLR similar to call forwarding on busy (network determined). Interception of this type of call forwarding is therefore done in the same way.