สืนค้ามีจำกัดครับมี 4 card ถ้าเหมาหมดแถม card openvoxTechnical Specifications Single Antenna for 4 GSM engines Up to four MC55i GSM modules. PCI v2.2, 5V or 3.3V signaling Dimensions: 145mm x 107mm (PCB) , 157mm x 132mm including SIM holder,bracket and connectors Little-endian and big-endian modes directly implemented in hardware. Output power : Class 4 (2 W) for EGSM850 Class 4 (2 W) for EGSM900 Class 1 (1 W) for GSM1800 Class 1 (1 W) for GSM1900 100% Linux/Asterisk Compatible Antenna connector: female SMA 50 ohm. Two independent serial ports to each GSM module Hot swappable SIMs Full-mesh hardware cross-connection between modules, SIMs and SIM UARTs Programmable clock generator with 3.5712, 4, 5, 7.1424, 8, 10, 14.28, 16 and 20 MHz outputs 3.0V and 1.8V SIMs supported 2048 bytes RX and TX FIFOs for improved jitter tolerance Hardware a-law and u-law companders/decompanders available on each FIFO LEDs for extensive monitoring of modules and card's state LED security (data cannot be easily extracted from the LED light output) Operating temperature: -20 °C to +45 °C Storage temperature: -40 °C to +85 °C