The Connect() method

Connect ();

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 Disconnect() method

Disconnect ();

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 "Interface" property

Interface  readable   s

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 MM_BEARER_IP_METHOD_STATIC or MM_BEARER_IP_METHOD_DHCP methods are given, the interface will be an ethernet-style interface suitable for DHCP or setting static IP configuration on, while if the MM_BEARER_IP_METHOD_PPP method is given, the interface will be a serial TTY which must then have PPP run over it.

The "Connected" property

Connected  readable   b

Indicates whether or not the bearer is connected and thus whether packet data communication using this bearer is possible.

The "Suspended" property

Suspended  readable   b

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.

The "Ip4Config" property

Ip4Config  readable   a{sv}

If the bearer was configured for IPv4 addressing, upon activation this property contains the addressing details for assignment to the data interface.

Mandatory items include:

If the bearer specifies configuration via PPP or DHCP, only the "method" item will be present.

Additional items which are only applicable when using the MM_BEARER_IP_METHOD_STATIC method are:

This property may also include the following items when such information is available:

The "Ip6Config" property

Ip6Config  readable   a{sv}

If the bearer was configured for IPv6 addressing, upon activation this property contains the addressing details for assignment to the data interface.

Mandatory items include:

If the bearer specifies configuration via PPP or DHCP, often only the "method" item will be present. IPv6 SLAAC should be used to retrieve correct addressing and DNS information via Router Advertisements and DHCPv6. In some cases an IPv6 Link-Local "address" item will be present, which should be assigned to the data port before performing SLAAC, as the mobile network may expect SLAAC setup to use this address.

Additional items which are usually only applicable when using the MM_BEARER_IP_METHOD_STATIC method are:

This property may also include the following items when such information is available:

The "Stats" property

Stats  readable   a{sv}

If the modem supports it, this property will show statistics associated to the bearer.

There are two main different statistic types reported: either applicable to the ongoing connection, or otherwise compiled for all connections that have been done on this bearer object.

When the connection is disconnected automatically or explicitly by the user, the values applicable to the ongoing connection will show the last values cached.

The following items may appear in the list of statistics:

The "IpTimeout" property

IpTimeout  readable   u

Maximum time to wait for a successful IP establishment, when PPP is used.

The "BearerType" property

BearerType  readable   u

A MMBearerType

The "Properties" property

Properties  readable   a{sv}

List of properties used when creating the bearer.