another suggeation

[diskman01]

Hi there..

would like to also suggest a call button.. or a way to make an alarm or a noise get peoples attention on the channel.

so if they have the device in their pocket they know im trying to get there attention tht i wish to talk to them.

[Mhowser]

Perhaps trigger vibration too.

[js-labs]

Hi!
Thank you for your ideas.
Now i am working on sound compression to reduce network traffic, will look at this after.