SGSN Configuration Node Configure the remote GGSN, access-control and other attributes of the SGSN Configure the local IP address to which the SGSN should bind for the Gp interface (towards the GGSNs). Please note that in case you would like to run the GGSN on the same machine as the SGSN, you can not run both on the same IP address. It is suggested to use 127.0.0.1 for the SGSN and 127.0.0.2 for the GGSN in such situations. Configure a static GGSN with a given numeric identifier to use the specified remote IP address. Configure whether to use GTPv0 or GTPv1 towards the specified GSSN number. Enable dynamic resolving of GGSNs based on DNS resolving the APN name like in a GRX-style setup. Changing this setting requires a re-start of the SGSN. Use the specified IP address for DNS-resolving the AP names to GGSN IP addresses Map the given APN Name to the given GGSN number. Map the given APN Name to the given GGSN number _only_ if the IMSI matches the given prefix. Add or delete the given IMSI to/from the global Access Control List. Configure the Authorization policy of the SGSN. This setting determines which subscribers are permitted to register to the network. Set the IP address of the HLR (gateway) for the GSUP protocol. This setting only applies if auth-policy remote is used. Set the OAP client ID for authentication on the GSUP protocol. This setting only applies if auth-policy remote is used. Set the OAP shared secret key K for authentication on the GSUP protocol. This setting only applies if auth-policy remote is used. Set the OAP shared secret OPC for authentication on the GSUP protocol. This setting only applies if auth-policy remote is used. Globally allow the given APN name for all subscribers. Set the file name for the call-data-record file, logging the data usage of each subscriber. Set the interval (in secodnds) for the call-data-record file.