Switching between RX/TX mode, using N210 and XCVR 2450

I’m using tunnel.py in narrowband, because my daughterboard is
half-duplex,
i have to implement time synchronization.

I tried include function time.sleep() in tunnel but when running my app
by
tunnel.py, i found that there some droped package.

How can i change the period of switching RX/TX in GNU?

thank,

Hoang

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ĐIỆN TỬ 03 - K54, ĐẠI HỌC BÁCH KHOA HÀ NỘI.