Page 326 of 378 Maintenance
553-3001-202 Standard 1.00 April 2000
Log files, such as Alarm and Trace files, if any, are written to the Flash File
volume and not lost when the card fails. Operational Measurement files are
recorded hourly and need to be uploaded to the MAT PC or other external
device for generating weekly or monthly traffic reports.

MAT

MAT 6.6 has backup and restore procedures for all data downloaded from, or
to, the card. When a MAT terminal is connected to the card, user intervention
is necessary to transmit all lost d ata from the MAT terminal to the ITG card.

Command line interface

If MAT is temporaril y unavailable, the ITG shell command line interface can
be used to retrieve configuration files from an FTP server or from a PC card.
Fault clearance procedures

DSP failure

In the case where one of the DSPs does not respond, a DSP reset is
automatically initiated by the host a nd an dspResetAttempted alarm is raised.
If the DSP fails to recover after the reset, a dspResetFailed alarm is rais ed a nd
that DSP is marked as unusable. Any c h an nels associated with that DSP will
cease to respond to the Meridian 1 and are ultimately taken out of servic e by
the Meridian 1 background audit procedures.
If a DSP fails, the following can occur:
• A DSP fails when no channel on it is in use (that is, no ex isting call uses
that DSP). All channel s ass ociated w ith that D SP are ma rked as D ISabled
until the DSP recovers. The leader card is notified so that no incoming
call is assigned to those channels.
• A DSP fails when a t le ast one of i ts cha nnels i s i n use. All c alls associat ed
with that DSP are dropped and all i ts channels are put into the DISabled
state. The leader card is no tified so that no incoming call is assigned to
those channels.
When the Meridian 1 initiates a call at a channel of a fai l ed DSP, the DCHIP
card sends a “REL ease COMplete” me ssage in response to indicate that t he
channel cannot be used. Then, the Meridian 1 generates the al arm “PRI0101”
and locks out the trunk by marking it “BUSY”. This mechanism is also used
to lock out a channel that does not have a corresponding DSP port.