# Calling a Node Only Within Its Working Time

Argus is designed so that it will not automatically dial a particular node in any time outside the node's working time interval specified by FSC-0062 Nodelist flag (`Txy`). The working time flag could be specified either in the Nodelist or in Node Overrides Table. If `CM` is specified for a node, this means that working time of the node is 00:00-24:00.

Remarks: If there are no working time flags specified for a node, this node may only be automatically dialled within Zone Mail Hour (ZMH).

Zone Mail Hour Table, sorted by UTC (Universal Time Coordinated), follows:

Zone 5 mail hour (01:00 - 02:00 UTC)

Zone 2 mail hour (02:30 - 03:30 UTC)

Zone 4 mail hour (08:00 - 09:00 UTC)

Zone 1 mail hour (09:00 - 10:00 UTC)

Zone 3 mail hour (18:00 - 19:00 UTC)

Zone 6 mail hour (20:00 - 21:00 UTC)

Other zone mail hours are custom and not internally supported by Argus. Use `Txy` to define custom mail hours.

If a poll is created manually, Argus ignores a node's working time.