... ,a point to point ,link circuit ,loop optical transmission equipment . It can supply 4/8/16/24 ... it can supply perfect network management function .Product features 1.realize CPE(customer premises equipment ) remoting monitoring to DTE ... parameters Optical fiber interface 1.fiber type : single mode fiber ,muti mode fiber ,optional2.wave length : 1310nm,1550nm,850nm,optional3.optical fiber interface ...