How to share one card with rs232 [TM-3000 series]

RS232 Master & Slave:
1. In this mode, you can connect 2 STB with RS232 cable(PIN2->PIN3,PIN3-->PIN2,PIN5->PIN5), the slave STB can share the Master smartcards.
2. If both Box has smartcard, it can be working as 2 CA.
3. Bound Rate can be changing;
3.1 -- 115200: Speed is high, but can only transmit short distance with RS232 cable.
3.2 -- 9600: Speed is low, but can only transmit long distance with RS232 cable.