The early communication service is to provide a voice service based on a public switched telephone network(PSTN) including wire connection. However, the communication service area is not limited to voice information service but developed even to transmit data of text and image in addition to the voice service. An analog communication system has been further developed and accomplishes the communication among mobile network subscribers or between a mobile network subscriber of the analog system and a conventional wireline public switched telephone network subscriber. Since this analog mobile data communication network works well by parceling total communication service area into a plurality of subarea according to a base station or a base station controller and by controlling the base station and the base station controller by a mobile switchingThere are fears for the safety of a group of hikers who were photographed walking near the edge of a crater just before a deadly volcanic eruption on New Zealand's White Island.

Live-posting cameras set up by New Zealand's geological hazard service captured the group's progress as they followed a path through a barren volcanic landscape towards white smoke billowing from the crater.

Photographs posted by the camera every 10 minutes show several groups of hikers moving about the crater, and the volcanic valley surrounding it.

However, only one group is still in view by the time of the eruption.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 34 seconds 34 s Eyewitness video shows tourists being evacuated