3Com S330 manual DS1/E1 UNI Module Alarms

Managing System Alarms 171

DS1/E1 UNI Module Alarms

Table 28 describes the alarms specific to the DS1 UNI and E1 UNI modules.

ATM Forum required alarms are indicated by the notation ATM Forum (R-xxx), where xxx is the required alarm number.

Table 28 DS1/E1 UNI Module Alarms

Alarm Meaning Troubleshooting Steps

AFA Link Removal Automatic Frequency Adjustment - Link removed from physical line group due to error rate in CRC check of T1/E1 exceeding user specified rate for a given period of time.

Check the removed link for the CRC errors.

Bad IMA ID	A link within the group has
	received an IMA ID from the far
	end that is different than when
	the group was initialized (and
	from the other links in the
	group). The link with the bad
	IMA ID is probably
	misconnected.

Check the links for proper connection. Reconnect if necessary.

Bad Link ID	Each IMA group assigns a
	unique Transmit link ID to each
	link in the group. This link ID
	should match the Receive link
	ID of the remote end IMA
	device. This alarm means that a
	link was operating correctly,
	but then received a Transmit
	link ID already assigned to a
	previous link.
	A Tx Misconnected alarm is
	also generated.
Bad M	The far end frame size M has
	changed in an IMA link.
	The maximum value for the
	frame size on the local device’s
	serial card must match the
	maximum value for the frame
	size of the connected device.
	The link with the BAD M is
	probably misconnected.

Check the links for proper connection. Reconnect if necessary.

Check to make sure the maximum frame size is set to the same value on the local and remote ends.

Bad Offset	Far end ICP cell offset has
	changed in an IMA link.
	Each IMA group assigns a
	unique Transmit offset to each
	link in the group. This alarm
	means that a link was
	operating correctly, but then
	received a Transmit offset
	already assigned to a previous
	link.
	A Tx Misconnected alarm is
	also generated.
(continued)

Check the links for proper connection. Reconnect if necessary.