Vodavi XTS-IP Technical Information download pdf (Page 297)

T-1/ISDN Alarm Programming 2-267

Chapter 2 - Features and Operation

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Once the desired alarm is selected, the following conditions can be programmed:

Button #12 = Clears the alarm

Button #13 = Minor threshold setting

Button #14 = Major threshold setting

Button #15 = Time period for Minor/Major alarms

Button #16 = Sends LCD message of Major alarms to first

Attendant Station

Enable/Disable (Carrier Loss Alarm)

Description

A Receive Carrier Loss (RCL) condition is declared when no bits have been received by the T-1

Trunk card for 150ms. It causes an Out of Frame (OOF) condition, and 2.5 seconds later a RED

Carrier Failure Alarm (CFA) state. During the time the RCL and RED alarm are declared,

incoming and outgoing signal bits are frozen. Outgoing calls cannot be made.

Programming Steps

1. Press the CARRIER LOSS flexible button (FLASH 47, Button #1).Button#1andButton

#11 LEDs are lit steady. The following message displays:

2. Enter a 0 or 1 on the dial pad to enable/disable this feature.

[0] = Disabled

[1] = Enabled

3. Press the HOLD button to save the entry. A confirmation tone sounds and the display

updates.

DEFAULT … Carrier Loss Alarm is enabled on all T-1 trunks.

Blue Alarm

Description

The Blue Alarm signal is an unframed all ones signal. It is transmitted by a remote device

(usually a CSU) and when received, indicates a transmission failure upstream of that device

toward the local end. The AIS alarm signal is also known as the keep alive signal in that it

prevents the T-1 circuit repeaters from malfunctioning when transmit from the remote end is

lost.

CARRIER LOSS 0-1

ENABLED

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