3com 520 用户手册

 

 

C

 

H

 

A

 

P

 

T

 

E

 

R

 

 1: 

 

G

 

E

 

T

 

T

 

I

 

N

 

G

 

 S

 

T

 

A

 

R

 

T

 

E

 

D

 

The ISDN OK LED 

 

does not light.

 

Follow the procedures as outlined for 

 

 

 

a)

 

Ensure that the OfficeConnect Remote is 

 

powered up and the POWER LED is lit. 

 

b)

 

Confirm that the ISDN UTP cable is 

 

correctly connected, and that the cable is 

 

attached to the socket marked ISDN. 

 

c)

 

Confirm that the ISDN line socket that is 

 

connected to the unit is conveying an 

 

ISDN service. 

 

d)

 

Check that the ISDN port is configured 

 

using the 

 

 

 

 command. See the 

 

 guide for more 

 

information about this command.

 

e)

 

Try making an ISDN call using a telephone 

 

connected to the ISDN line to confirm if 

 

the line is operational. 

 

f)

 

If the LED still fails to light, plug the UTP 

 

cable into an alternate ISDN service socket 

 

to confirm that it functions. 

 

g)

 

Try using an alternate UTP cable to 

 

connect the unit to the ISDN service 

 

socket.

 

 

 

If other LEDs do 

 

not light during 

 

operation of the 

 

unit.

 

During normal operation the remaining unit 

 

LEDs should light and extinguish depending 

 

on the action being taken. If the LEDs fail to 

 

light in accordance with their function (refer 

 

to 

 

 

 

 

), then contact 

 

your supplying 3Com reseller.

 

The local unit 

 

does not connect 

 

to the remote 

 

unit.

 

a)

 

Check the connections between the unit, 

 

the network, or PC and the ISDN line.

 

b)

 

Confirm that the line is working by 

 

connecting a telephone to the ISDN line 

 

to make a call.

 

c)

 

Check that the number which you are 

 

dialling is connected to the remote unit 

 

and that the unit is configured to be able 

 

to answer calls.

 

 

Rc.bk : RC01.FRM  Page 40  Thursday, July 10, 1997  9:53 AM