The IMS version is 8.1. The IMS subscriber A registered on HSS and ATS normally, and have the international call out right and call forward unconditional right. A can call international number tel:+8613912340001
normally, but can not register CFU to this international number. When execute REG CFU on ATS and the destination IMPU is tel:+8613912340001
, the operation will fail:
Neither CFU nor other kinds of call forward can register to international number.