Wireless Bridge Connection Equipment Provide bridge connection route between different sim card operator 2 ports (G=G,G=C,C=C),One pair of bridge connection 4 ports (G=G,G=C,C=C),Two pairs of bridge connection 8 ports (G=G,G=C,C=C),Four pairs of bridge connection For example: A B C D 4 sim cards, A & B belong to one operator X, C & D belong to other operator Y B C are pretended to equipment , A want to call D, then A call B at first, then B bridge connection C, C call D from A, Begin the talking between A and D.