The maximum waiting delay (MWD) timeout value is used
for the media gateway to send the first Restart In
Progress to the MGC (Media Gateway Controller).
When a gateway is powered on, it should initiate a restart
timer to a random value, uniformly distributed between 0 and
a maximum waiting delay (MWD). The gateway should send the
first RSIP message when the timer expires.
The initial value of this object is chosen in an
implementation-dependent manner by the MGCP functionality
based on the call volume of the system.