This attribute specifies the quality of service for the receive
direction for this connection.
The constantBitRate class refers to traffic offered on services such
as a constant bit rate video service.
The variableBitRate class refers to traffic offered on services such
as packetized audio and video.
The connectionOriented class refers to connection-oriented traffic.
The connectionless traffic refers to traffic offered through
connectionless trunks.
The unspecified class supports a 'best effort' type of service, where
there is a minimum guarantee of bandwidth.
The sameAsTx selection sets the receive quality of service to be the
same as the transmit quality of service.
This attribute is obsolete. The value of txQosClass is migrated into
atmServiceCategory. The value of this attribute is ignored.
AtmServiceCategory applies in both transmit and receive directions.