[org.freedesktop.Telepathy.Client.Observer.ObserverChannelFilter 3]
org.freedesktop.Telepathy.Channel.ChannelType s=org.freedesktop.Telepathy.Channel.Type.Call1
org.freedesktop.Telepathy.Channel.TargetHandleType u=1

[org.freedesktop.Telepathy.Client.Observer.ObserverChannelFilter 4]
org.freedesktop.Telepathy.Channel.ChannelType s=org.freedesktop.Telepathy.Channel.Type.Call1
org.freedesktop.Telepathy.Channel.TargetHandleType u=2