Is it possible to trade with a broker without using its platform?

For example, trade with MB Trading without using MBT Navigator? I am behind a firewall when I work during daytime.
Thanks a lot!

Contact your broker if you can place orders through the Trade Desk phone number

most broker's don't like you calling in trades unless there's a problem with there platform, i tried that awhile back and the guy at the trade desk reminded me the platform was working fine, get the hint.

I think no.