:: With twin subscribers junction box we can solve the problem with twin subscribers (subscribers usin the same pair), enabling them to use the phone service simultaneously. Or we can provide telephone with DSL services for one of the subscribers, using the pair of the existing subscriber without DSL services.

:: In these cases, if we use one-pair splitter at the subscriber side too, we would have two different subscribers, one with DSL services (IP phone, high speed Internet, IP television) and the other with conventional phone. One-pair CO splitter at the subscriber side is used to filter both signals (DSL and phone), in order to eliminate the possibility that the DSL subscriber uses conventional phone of the other party.

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