This device can utilize 8 standard E1 transmission channels (G.703 standard), and directly provide various user interfaces such as voice, data, and image. Simultaneously, it has time slot non blocking cross connection devices between 8 sets of E1 and all user interfaces. At the same time, the device has multiple clock modes,
The number of 240 voice interfaces can be expanded through 8 E1 interfaces on the main control panel, and key units can adopt dual disk mutual backup.
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