Date Added: Oct 2010
This paper aims to examine the security issues in the IP-PBX (IP Private Branch Exchange) .The Traces are taken on the live environment using Vendor 'X' CDMA MSC. The traces are also taken at SBC (Session Boarder Controller). The PBX services can be provided over IP via a SIP (Session Initiation Protocol) trunk provided by network operator. The SIP trunk is connected to a switch i.e., MSC. Thus IP connectivity is available at IP-PBX end. Now calls can be originated from IP-PBX which is terminating on a mobile handset registered with MSC. The problem arises when a dummy/blank/fake CLI (Caller Line Identification) is configured at IP-PBX.