Казалось бы, при чем тут Опера?

из модем ХАВ-ТУ:

"This is an overrun of the hardware FIFO buffer and you can't increase its size. Bug note (reported in 2002): Due to a bug in some kernel 2.4 versions, the port number may be missing and you will only see "ttyS" (no port number). But if devfs notation such as "tts/2" is being used, there is no bug. See "Higher Serial Thruput" in the Serial-HOWTO."

а шо за прога?

qq

Обмен данными по промышленному протоколу