E5515C External PDSN Connection
The MOB-IP-SIM communicates with the mobile station through the E5515C; therefore, the E5515C and the MOB-IP-SIM must pass packets. This is coordinated over a TCP control connection on port 53613.
If this connection fails, check the following:
E5515C and MOB-IP-SIM both connected to the same ethernet hub.
Netmasks set the same.
Each device has its own address, not used for anything else.
Addresses are on the same subnet (where the netmask has a 1 bit, the addresses should match in the corresponding bit).
Port number set to 53613.
Correct "External PDSN IP Address" set on E5515C.