ADTRAN 1200305L1 system manual Indicates a loss of signal detected on the port interface

Section 4, User Interface Guide ATLAS 550 System Manual

MODULES (NXT1HSSI) > T1 MENUS > ALARM STATUS

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Displays the current alarm status for each of the built-in T1 ports located on the NxT1 HSSI and NxT1 HSSI/V.35 Option Modules.

MODULES (NXT1HSSI) > ALARM STATUS > PRT

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Indicates the operating port number for the selected T1 interface. There are four available T1 interfaces on the NxT1 HSSI and NxT1 HSSI/V.35 Option Modules.

MODULES (NXT1HSSI) > ALARM STATUS > ALARMS

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Provides a listing of possible alarm conditions on the T1 interface. An asterisk (*) indicates the presence of an alarm condition and a hyphen (-) indicates no active alarm. The following alarms are monitored:

LOS	Indicates a loss of signal detected on the port interface.
RED	Indicates the inability to frame data received on the port. Alternately
	referred to as Out of Frame (OOF).
YELLOW	Receiving a remote alarm (RAI) on the interface from the far end.
BLUE	Receiving unframed all ones from the port Alarm Indicator Signal (AIS).
DS0 ALARM	Displays per-DS0 alarm status; that is, at least one DS0 channel is in
	alarm if an asterisk (*) appears. These alarms usually indicate the failure
	to receive the protocol that has been configured for the DS0.

MODULES (NXT1HSSI) > ALARM STATUS > RX LEVEL

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(Receive Level) Indicates the strength of the signal received on the port (in dB).

MODULES (NXT1HSSI) > PERFORMANCE CURRENT

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The performance fields (either current, 15-minute total, or 24-hour total) provide status on key performance measures as specified in ANSI T1.403 and AT&T TR54016 for the T1/PRI port. Except for CLR, these fields are all read-only. The monitored parameters include the following:

PRT

CLR

ES

BES

SES

Displays the port number

Clears performance information for the selected port

Errored Second (ES) is a second with one or more error events OR one or more Out Of Frame events OR one or more Controlled Slips

Bursty Errored Second (BES) is a second with more than one, but less than 320 error events

Severely Errored Second (SES) is a second with 320 or more error events OR one or more Out Of Frame events

166 © 2002 ADTRAN, Inc. 61200305L1-1F