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NEC SLIE(4)-U10 Analog Station Card(Unused)
The SLIE(4)-U10 Card is the expansion Single Line Interface Card that plugs into the SLIB(4)-U10 Card to provide an additional 4 ports for Single Line Telephones,and also provides Ringing Signal Generator(RSG)and Message Waiting(MW)LED voltage to Single Line Telephones. SKU: 750218