Multitech ISIHP-4U Betriebsanweisung PDF herunterladen (Seite 19)

Chapter 2 - Hardware Installation

LINE 1

LINE 2

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-2U is

turned on.

 Flashes until SPIDs are verified

with the central office switch;

then remains lit without flashing.

 Indicates data link layer status.

The settings of the multiple DIP switch

unit on the mounting bracket determine

the base Input/Output address for the

ISIHI-2S/2U card. Input/Output

(I/O) addresses are used to route

information to and from the card.

ISIHI-2U LED Indicators

Figure 2-7. ISIHI-2U LEDs

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 129 130

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Multitech ISIHP-4U Betriebsanweisung Seite 19