Various embodiments of a 911 emergency voicedata telecommunication network are provided. Complementary finger pairs extend upwardly from the base. Hence, the amount of laser light L1 cut by the surrounding part of the first light-transmitting hole 32 can substantially be eliminated, whereby the lens holder 29 can be prevented from being heated upon irradiation with the laser light L1. Information related to such actions is returned to the web client via the local web server. The microwave oven further includes a steam guide passage which is provided in the cabinet to guide steam generated from the steam generating unit into the steaming unit.