Multi-tech-systems ISIHP-2U Uživatelský manuál stáhnout pdf (Strana 18)

18 MultiModemISI Hybrid Series, ISIHP-2S/2U/4S/4U/4SD

Hardware Installation

ISIHP-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 ISIHP-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.

LINE 2

LINE 1

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Multi-tech-systems ISIHP-2U Uživatelský manuál Strana 18