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MA20 PC PCM comprehensive model PDH

MA20 PC PCM comprehensive model PDH is a synthetic access, transmission and switching platform.
The optional network transmissions interface include three kinds, i.e., V.35 electrical interface (rate is 64kbit/s~2048kbit/s), E1 electrical interface (rate is 2,048kbit/s), optical interface (rate is 2,048kbit/s~150Mbit/s), it satisfies different network demands: Among them, the V.35 electrical interface as a network transmission interface can provide a dynamic rate change transmission ability, especially applicable to the need of the satellite transmissions and ground wireless transmission network; The network structure is mainly point-to-point, we call it as low speed PCM. When using E1 electrical interface as the network transmission interface, we call it general use standard PCM, the network structure can be point-to-point, point-to-multipoint, single E1 ring, double E1 ring. While using optical interface as network transmission port, we call it high-speed PCM or generally called fiber-optic telephone, the network structure is point to point and single fiber-optic ring.

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