This object specifies the type of backoff algorithm used on the units in the stack. Any port can use the standard ethernet algorithm or, for PACE applications, it can be set into low latency mode. In this mode, the backoff algorithm is optimised to minimise the possibility of collisions. The value of this object defines the setting that those ports will use which have prConPortPaceMode set to useDefault(2). PACE mode can be set for the whole stack or for individual ports. When a unit is initialised to factory defaults, prconPortPaceMode for every port is set to useDefault(2), and the actual setting for the port is decided by the value of this object. The manager has the choice, therefore, of varying the mode for every port in the stack, or for individual ports only.