I need a optical transceiver which it can be transmit/receive two different data rate in one transceiver through 1 optical fiber. We call it dual bidi (Bi-directional) transceiver. The data rate is one is 3Gbps and the other is RS232C data rate. The demand is around 200pcs per month and my target price is around $20/pcs. If somebody can supply it, I want to discuss with them.