Sekarang transport pada jaringan 3G ada yang sudah based on IP. Untuk membedakannya, nodeB yang down itu sudah full ip atau masih ATM, lihat apa ada alarm SCTP Link Down juga. Jika ada, berarti nodeB tersebut sudah full ip.

SCTP itu ...

SCTP is a new IP Transport protocol, which exists at an equivalent level with TCP and user datagram protocol  (UDP) and which currently provides transport layer functions to many Internet-based applications. SCTP has been approved by the IETF as a proposed standard, and is specified in RFC 2960.

SCTP itu, protocol transport IP. Oooo..... jadi wajar saja kalau node b full ip down, alarm SCTP Link Down ikutan muncul. J