Help a brother out . . . Please

Struggling here. All seems ok, it will receive and the green light on 888 comes on…

However, it doesn’t see to transmit. The telemetry says ppt is keyed. It no transmit light on 888 and nothing sent.

I do get voltage from the Ptt wire from the usb fob when it says it’s keyed. But 888 does bugger all.

Hi, when you say you see voltage it sound bizarre. Usely you will groud the line to PTT.

Test to see if you ground the ptt line if the radio goes on ptt?