Samsung iDCS 500 Expansion Card (Refurbished)More Information: 8 circuit analog station interface for industry standard single line telephones that require operation of an industry standard message waiting lamp with a voltage range of 85 ~ 96 VDC Lamp can be programmed to be on continuously or flash at a programmable rate of 100ms to 200ms ON OFF times Does not contain any over voltage protection and is not qualified as OPX Does not contain DTMF receivers, but instead shares the system DSP
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