This attribute indicates a maximum of eight types of trunks that can
be part of the selected route. The terrestrial and satellite trunk types
have been defined already, leaving six remaining types that can be
defined by the network administrator. The trunkType attribute of the
Trunk PathAdministrator (Trk Pa) component specifies the type of
the trunk. When selecting a route, RouteSelector only chooses
trunks whose trunkType is one of the permittedTrunkTypes.
Description of bits:
terrestrial(0)
satellite(1)
trunkType1(2)
trunkType2(3)
trunkType3(4)
trunkType4(5)
trunkType5(6)
trunkType6(7)