T1 Monitoring; Emergency Stand-Alone Mode - Avaya Communication Server 1000M Single Group Manual

T1 monitoring

MCR keeps performance statistics for the current hour and for each hour in the past twenty-
four. MCR's T1 framer chips monitor the performance of the T1 links. Once a second MCR
reads the framer registers and keeps a record of the following statistics:
• Errored Second — 1 or more CRC-6 errors or 1 or more out of frame (OOF) conditions
during the second
• Bursty Second — More than 1 but less than 320 CRC-6 errors during the second
• Severely Errored Second (SES) — 320 or more CRC-6 errors or 1 or more out of frames
(OOF) during the second (not displayed)
• Unavailable Seconds (UAS) — Unavailable state starts with 10 consecutive SES and
ends with 10 consecutive non-SES
• Controlled Frame Slip Seconds — 1 or more frame slips during the second
• Loss of Frame Count — Loss of Frame or Loss of Signal for 3 consecutive seconds
When the T1 framer is configured for D4 operation, the firmware uses bi-polar violations instead
of CRC-6 errors. When using bi-polar violations, the total number of bi-polar violations are used
as CRC-6 errors in the above calculations.
In addition to the above performance statistics, the firmware keeps a total error counter for
each carrier. The error counter is a count of the CRC-6 errors + frame slips + out-of-frame
(OOF). This counter counts from 0 to 65,535. Once reaching 65,535 the counter is not
incremented further. The counter can be reset to 0 by entering the CLEAR ERROR (C E)
command.

Emergency Stand-Alone Mode

Emergency Stand Alone Mode (ESAM) is a Mini-Carrier Remote feature that provides limited
telephone service to 16 digital telephones and 8 XUT ports. The RMI has a faceplate toggle
switch that determines ESAM functionality for the board. The toggle-switch can force ESAM
mode to be active at all times or allow ESAM to be automatically activated. When the switch
is set to ESAM, ESAM mode will always be active. When set to NORM, automatic selection is
enabled and the MMI configuration will control ESAM's activation. At the MMI, ESAM can be
set to always be enabled, never be enabled, or activate when alarm level 2 is reached on all
carriers.
The following models of the Meridian Digital Telephone support ESAM:
Table 3: Meridian Digital Telephone models supporting ESAM
2008
Mini-Carrier Remote Fundamentals
With display
Functionality
March 2013 33