immediately: The first gateway registration that comes from the gateway is honored, regardless of context count or time of day.

A warning is visible when a user selects this option. This option is the default value for all rules.

0-active calls: The first gateway registration reporting 0 active calls is honored.

Time-day-window: A valid registration message received during any part of this interval is honored.

Any number of active calls are supported. The time scale provided for each day of the week goes from 00 to 2300 hours (military time). The user must type an x or X for each hour where return migration must be permitted. To disallow return migration for a given hour, the field is left blank. This method gets around overlapping time issues between days of the week. Users can specify as many intervals as required.

Time-window-OR-0-active-calls: A valid registration is accepted anytime, when a 0 active call count is reported. The registration is also accepted if a valid registration with any call count is received during the specified time or day intervals.

The time scale provided for each day of the week goes from 00 to 2300 hours (military time). The user must type an x or X for each hour where return migration must be permitted. To disallow return migration for a particular hour, the field is left blank. This method gets around overlapping time issues between days of the week. Users can specify as many intervals as required.