22 Channels

1. 본문

"22 Channels" can refer to several different things:
1. Walkie Talkies/Two-Way Radios:

• Many consumer walkie-talkies, especially those using the Family Radio Service (FRS) and General Mobile Radio Service (GMRS) in the US, feature 22 channels.
• These channels are pre-programmed frequencies that allow users to communicate with each other.
• Some models offer privacy codes (CTCSS tones) that provide up to 2178 combinations to help block other conversations, offering many channel options to minimize interference.
• Features on these radios may include hands-free operation (VOX), call alerts, and channel scanning.

• In the United States, many television stations broadcast on digital channel 22.
• These include a variety of local and rebroadcast stations.

• These are specific radio frequencies used for paging systems.
• As of July 3, 2024, Part 22 paging frequencies, particularly the 152/158 MHz and 454/459 MHz paired channels are sometimes repurposed.
• They can be used by state and local public safety agencies, or for other types of communication systems.

• As of September 28, 2017 there were changes made to FRS/GRMS Channels.
• 22 channel radios that were previously marketed as GMRS/FRS combination radios have been reclassified as FRS radios.