Multi-Tech ISIHI-2S Especificações descarregar pdf (Página 21)

MultiModem ISI Hybrid Series, ISIHI-2S/2U 21

Chapter 2—Hardware Installation

ISIHI-2U LED Indicators

P LED Indicator

 Indicates U interface status connection.

 Controlled by NT-1, which converts S/T interface (4-wire ISDN) to

U interface (2-wire ISDN).

 When U interface and S/T interface are NOT active, LED remains

off.

 Flashes 8 times/second (8 Hz)U interface is attempting to

activate.

 Flashes once/second (1 Hz)U interface is active; S/T interface is

not fully active.

 Lit, not flashingBoth U and S/T interfaces are active.

D LED Indicator

 Lights when the ISIHI-2S/2U is turned on.

 Flashes until SPIDs are verified with the central office switch; then

remains lit without flashing.

 Indicates data link layer status.

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Multi-Tech ISIHI-2S Especificações Página 21