... )Ethernet interface 10M/100M, full/half duplex self-adapt,support VLAN. (4)support AUTO-MDIX, straight and crossover auto-adapt. (5) ... . (10)E1 interface have built-in clock resume circuit and HDB3 codec circuit. (11)Support E1 channel hot plug, and auto detect available ... E1 channels. (12)Support flexible setting of 1 to 8 ...