E1-RS232/422/485

E1 to RS232-485-422

E1 to RS232/RS485/RS422

1. Based on self copyright IC
2. Supports 3 wire RS232 (TXD, RXD, GND) and supports flow control CD, DSR, CTS
3. Provides 2 kinds loop back：E1 local loop, RS232/RS485/RS422 local loop
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