Question regarding Walkie Talkie/ portable radio jacks, HOW EXCITING?

Hello, it would be a wonderful help if anyone could provide me with information relating too the jacks that are common on walkie talkies i think, its a 3.5mm audio plug and a 2.5mm one side by side, What do they each do? I have an old throat mic and was wanting to fiddle around with it, thanks very much

Kylenstevo,Question regarding Walkie Talkie/ portable radio jacks, HOW EXCITING?
Actually, the general two-way radio standard is that the 2.5mm is the microphone and the 3.5mm is for the speaker. Both are mono connections. For PTT (push-to-talk) you put 2.2k惟 from the 2.5mm TIP to ground (2.5mm ring). So, in order to use your throat mic, wire it up with a 2.5mm mono plug. For PTT, rig up a momentary SPST switch with one lead going to ground of the 2.5mm plug and the other switch lead going to the tip via a 2.2k惟 resistor. That'll key up the radio for you remotely. Some radios will let you use the PTT on the radio while having a mic plugged into the jack, some won't. It depends on the radio so best to wire a remote PTT when using the speaker/mic jack to be safe. Also, in Kenwood radios, the 2.5mm and 3.5mm jacks are reversed from the standard. Most that have a 2.5mm and 3.5mm jack are as I have already mentioned.Question regarding Walkie Talkie/ portable radio jacks, HOW EXCITING?
There are the connectors for Speaker,mic and push to talk button for the handset!3.5 is for SP/MIC and the small one is for push to talk button.