In the more advanced systems of this type, the crosspoints occupy some 0.2 to 0.5 printed circuit boards per subscriber. In junctors and subscriber line equipments, the components that send and receive signals over the analog lines and trunksanbsp;...
Title | : | Electronic switching |
Author | : | GRINSEC (Group) |
Publisher | : | North Holland - 1983-10-01 |
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