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Subject: V.35,V.11,RS422-a,RS449 ????

Date: 08/24/99
Posted by: Zhang Lei
E-mail: z_l(at)990(dot)net(no spam)
URL: http://

Message:

Dear Sir: I have just asked to design a serial board.They tell me to design a V.35 interface. Someone said that it is compatiable to V.11.Others say that V.11 is compatiable with RS422-A.And some signal may be no useful and can be removed. When I am surfing on the web,an engineer tells me that RS422-A is RS-449. What a mass! Could you tell me the difference and compatibility between these protocols? Thanks. Zhang Lei

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