[多选题]注册HSS失败,I-CSCF网元返回600失败响应。故障原因可能是( )。
Register HSS failed, and I-CSCF returns 600 fault response. The fault cause may be ( ). A.S-CSCF找不到合适的I-CSCFS-CSCF fails to find proper I-CSCF B.I-CSCF找不到合适的S-CSCFI-CSCF fails to find proper S-CSCF C.没有配置按能力选择S-CSCFthe NM system is not configured to select S-CSCF by capability D.没有配置服务节点池no service node pool is configured E.没有配置按能力选择I-CSCFthe NM system is not configured to select I-CSCF by capability