Requests activation of a packet data connection with the network using this bearer's properties. Upon successful activation, the modem can send and receive packet data and, depending on the addressing capability of the modem, a connection manager may need to start PPP, perform DHCP, or assign the IP address returned by the modem to the data interface. Upon successful return, the Ip4Config and/or Ip6Config properties become valid and may contain IP configuration information for the data interface associated with this bearer. The number to use for dialing (optional). Usually not required, in which case it should be an empty (zero-length) string. Only required for POTS connections or in certain special circumstances. If a number is given for 3GPP (GSM/UMTS/LTE) based devices, it is always ignored, as the number is generated internally if one is required at all. Disconnect and deactivate this packet data connection. Any ongoing data session will be terminated and IP addresses become invalid when this method is called. The operating system name for the network data interface that provides packet data using this bearer. Connection managers must configure this interface depending on the IP "method" given by the "Ip4Config" or "Ip6Config" properties set by bearer activation. If STATIC or DHCP methods are given, the interface will be an ethernet-style inteface suitable for DHCP or setting static IP configuration on, while if the PPP method is given, the interface will be a serial TTY which must then have PPP run over it. Indicates whether or not the bearer is connected and thus whether packet data communication using this bearer is possible. In some devices, packet data service will be suspended while the device is handling other communication, like a voice call. If packet data service is suspended (but not deactivated) this property will be TRUE. If the bearer was configured for IPv4 addressing, upon activation this property contains the addressing details for assignment to the data interface. If the bearer specifies configuration via PPP or DHCP, only the 'method' item will be present. Available items include: method: (uint) One of MM_MODEM_BEARER_IP_METHOD address: (string, STATIC method only) IP address prefix: (uint, STATIC method only) Numeric CIDR network prefix (ie, 24, 32, etc) dns1: (string, STATIC method only) First DNS server dns2: (string, STATIC method only) Second DNS server dns3: (string, STATIC method only) Third DNS server gateway: (string, STATIC method only) First DNS server If the bearer was configured for IPv6 addressing, upon activation this property contains the addressing details for assignment to the data interface. If the bearer specifies configuration via PPP or DHCP, only the 'method' item will be present. Available items include: method: (uint) One of MM_MODEM_BEARER_IP_METHOD address: (string, STATIC method only) IP address prefix: (string, STATIC method only) Network prefix dns1: (string, STATIC method only) First DNS server dns2: (string, STATIC method only) Second DNS server dns3: (string, STATIC method only) Third DNS server gateway: (string, STATIC method only) First DNS server Connection managers should use PPP to get the address. Connection managers should use the provided static IP configuration given by the modem to configure the IP data interface. Connection managers should begin DHCP on the data interface to obtain necessary IP configuration details.