The NEC DSX-80/160 1091004 16-Port Digital Station Card card connects 16 digital extensions. The 16ESIU has a Mode Switch (for taking the card out of service). It also has a status LED that indicates proper card operation - as well as a port activity LED that flashes faster as traffic on the card increases. You can install up to two 16ESIU Cards in a DSX-80. You can install up to six 16ESIU Cards in a DSX-160.
The NEC DSX 1091004 16-Port Digital Station Card features 16 Digital Station Ports, LED Status light, LED Activity light, and Mode Switch.
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