This group specifies the mapping from the defined transfer priority
to the egress emission priority and routing class of service.
The mapping of transfer priority to egress emission priority and
routing class of service may be modified by the user. Any changes
to transfer priority mappings take effect on new calls. Existing
connections are not affected by changes to transfer priority
mappings unless the service is reset by locking and unlocking the
connection or resetting the card where the service resides.