3Com 510, 520, 530 manual Software Reference guide for more

1-40	CHAPTER 1: GETTING STARTED
Malfunction		Remedy
The ISDN OK LED		Follow the procedures as outlined for “The
does not light.		POWER LED does not light.”
		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

Malfunction	Remedy
If other LEDs do	During normal operation the remaining unit
not light during	LEDs should light and extinguish depending
operation of the	on the action being taken. If the LEDs fail to
unit.	light in accordance with their function (refer
	to “Front Panel” on page 1-6), then contact
	your supplying 3Com reseller.

	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 CO PO command. See the
	Software Reference 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.

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.