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An classical PCM30, multiplexex 30 channels of voice data into one 2.048Mbit/s data signal, E1 interface is used to connect with the fiber optic multiplexer, data microwave or frequency amplification. With the optical interface, the equipment can transmit 30 channels voice data to remote by directly plug the fiber. Various of interfaces, such as, remote 2/4 EM interfaces, RS232 interfaces, Carrier magnet interfaces, Ethernet interfaces, V.35 interfaces, and stereo signal interfaces.

The special feature of the equipment is that it is possible to connect with the Program-controlled switchboards to realize picking numbers, it is more convenient than by analog interface. Because the Program-controlled switchboards will cost too much project connection and save plate of the program-controlled switchboards. The investment can be also save double. It needn't set a PCM30 at the Program-controlled switchboards. No only connecting with Harris and Siemens, but also with Ericsson, however, for most PCM, it can't achieve. It is decided if there is signal process ability in the PCM30. 

    The network management of OMPCM30 is directly connected to the PC or COM interface, The SABIT of the TS0 slot idle BIT in the E1 is adopted to realize the network information of the remote, that is to say, it is not necessary to use other transmission of channel.