Bell

The bell is a device placed on many walls at Gunn that plays a 1000 Hz sine wave tone for 4 seconds (formerly a 659.255 Hz square wave for 5 seconds) and follows the bell schedule, including alternate schedules. Timothy Herchen once recorded the bell.

The new clocks are capable of displaying 4 main screens: a date/time screen, a welcome screen, a fire alarm screen, and an "all clear" screen. Of these 4 screens, only the first screen has been seen on clocks at Gunn. When the clock boots, it shows a fifth screen with scrolling text reading "AtlasIED IPX IP-SDMF" and contains some information such as the firmware version (1.6.0), the MAC address, and the IP address. The MAC address of a speaker can also be found by reading a barcode label found under outdoor speakers or on the left face of indoor speakers.

When the new bell rings, scrolling text appears on the screen reading "Bell Schedule." This is likely placeholder text.

Installation of new clocks

At the beginning of the 2022-2023 school year, the clocks were replaced with AtlasIED IPX IP-SDMF speaker clocks. The 3 types of clocks were each replaced with different types of mounting hardware.

The clocks with an overlapping speaker and clock were replaced by the surface mounting hardware, since the shapes match perfectly, and there are no extra components on the wall that require maintenance.

The units with gray boxes containing separate areas for the clock and speaker had the analog clock removed and the slant mounting hardware placed on top of the clock. This is due to the fact that the speaker has hardware in the wall that would be exposed if the gray box was removed.

The digital clocks in the P building and S building were replaced by the flush model, as the old clocks were also flush in the wall, and they were the exact same size.

Glitches

On 9/27/2021 and 9/30/2021 (Monday and Thursday), the bell unexpectedly rang at 12:40, followed by a PA announcement at 12:45 saying the bell "that just rang" should be ignored. Additionally, on 9/27, there was a second unexpected bell at 12:55, with no announcement.

On 5/10/2022, the bell rang at 8:53AM instead of 8:52AM, then did not ring again until 12:20PM. Announcements were made on the PA system, and a number of "Test 1 2 3 test" announcements were made. The bell worked fine on 5/11, but on 5/12, it did not ring at either 8:52 or 9:00. A PA announcement was made around 9:02, followed by the bell ringing, and it worked after that.

On 9/7/2022, the clock screens turned off, and showed a stuck pixel in the middle shortly after. After this, scrolling text displayed, reading "AtlasIED IPX SDMF" including the firmware version, v1.6.0. This is outdated from the latest firmware, firmware 1.6.5, which may be causing inconsistencies between the clocks.

Gallery

• 

  Supported clock screens

• 

  Old Valcom bell