In Springfield's triple-deckers and brick apartment blocks, the person calling is often the landlord or property manager, and the emergency is multiplied across units. The triage call goes faster when you have four things ready: the address and which units are affected (all of them, or just one floor — the pattern is diagnostic), the fuel type (gas, oil, or steam), whether you can get the technician into the basement and any locked utility areas, and who authorizes the work.
Do not have tenants keep resetting an oil burner — repeated resets flood the chamber with unburned fuel and turn a service call into a cleanup. If the boiler is gas and the unit simply will not fire, check the thermostat setting and the emergency switch before calling; those two account for a surprising share of panicked calls. Authorization belongs to the owner or manager — say who that is on the call so dispatch does not stall.