NTP
Family  Automatic  Trunk  Testing   Description.   ATT  operating
procedures are in the POP, NTP 297-1001-500.


6.   REPORTING FACILITIES


ROUTING AND REPORTING SYSTEM


6.01   The Routing  and Reporting system (RR)  is responsible for
controlling message flow to Telco personnel.  Messages are routed
through the  RR system  which provides  an interface  between the
maintenance system, the alarm system, the logging system, and I/O
devices such as the MAP, printers  and magnetic tape drives.  The
RR system  assigns priorities to  messages, formats  them, checks
for   thresholds,  determines   output   routes,  and   activates
appropriate alarms. A message with a  threshold value will not be
output until the threshold has been exceeded, in which case it is
proceeded by a warning message. An  inhibited message will not be



                         DMS 100 FAMILY
        MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION
               (c) NORTHERN TELECOM LIMITED, 1978








                        NTP 297-1001-107                  PAGE 15
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output at all.

6.02   Input and output messages are  assigned one of 32 input or
output message  classes.  The message classes  are fixed-assigned
to any combination  of the 32 I/O  channels by the Telco,  in the
office specification. A threshold can  be assigned to any message
to limit  the number of times  it is issued.  When  the threshold
value  is exceeded,  a 'threshold  exceeded'  message is  output,
followed  by  the   message  itself.   Output  messages   can  be
temporarily rerouted or inhibited by  Telco personnel via the MAP
or other I/O device. The message  class to I/O channel assignment
can be changed via DMO procedures using the Table Editor.

6.03    A  message holding  area,  referred  to  as the  LOG,  is
provided for storing up to several hours of output messages.  The
quantity  of  messages  stored  is dependant  on  the  number  of
messages generated  by the  system and  on the  amount of  memory
provided.   In  general, output  messages  requiring  maintenance
action are sent to the designated MAP or other I/O device and the
remainder to the log, thus  preventing Telco personnel from being
inundated with irrelevant  data on topics other  than the problem
at hand. Once the log is full,  entry of a new message causes the
oldest  message to  be pushed  out of  the log  and become  lost.
Telco personnel can extract individual messages from the log on a
message  class  or  alarm  class  basis  in  chronological  order
starting with  the most recent one,  thus obtaining a  history of
maintenance action.

6.04    For  more  details  on  the   RR  system,  refer  to  NTP
297-1001-106  DMS 100  Family  Maintenance  System.  The  format,
content, and  classification of output  messages is  described in
NTP 297-1001-510 DMS 100 Family Output Messages Description.


ALARM SYSTEM


6.05   The alarm system is  responsible for providing audible and
visible indications of various trouble  conditions within the DMS
switching  office  or  external to  it,  and  aiding  maintenance
personnel in the identification and location of the source.

6.06   Alarms are grouped into three categories as follows:

     a)  Locally  Detected  Alarms  -   These  are  initiated  by
                    hardwired alarm contacts and tend to be power



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        MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION
               (c) NORTHERN TELECOM LIMITED, 1978








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                       PREL., ISSUE 01D01
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                    related,   eg.  fuse   and  power   converter
                    failures.

     b) System Detected Alarms - These  are generated as a result
                    of software detected system faults.

     c) Externally Detected Alarms -  These are generated outside
                    the  switching office  although  they may  be
                    initated by  related devices such  as Carrier
                    Group alarms.  External alarms are interfaced
                    to the  DMS system by  scanpoints, assignable
                    by Telco personnel.

Alarms are  reported at  3 levels  of severity  according to  the
urgency to restore the system to  normal.  In decreasing order of
urgency they are:

     a) Critical

     b) Major

     c) Minor

6.07   Alarm messages are sent to the MAP or, via a data link, to
a  remote  terminal.   Audible  and  visible  indicators  can  be
activated  in  the office,  on  another  floor,  or in  a  remote
monitoring center.   Aisle indicators  assist Telco  personnel in
locating fuse and power failures.

6.08   Transferring or grouping of  alarms is accomplished by the
operation of  a key on the  Alarm Control and Display  unit (ACD)
located  near  the  MAP.  Cancellation of  an  audible  alarm  is
accomplished by  removal of the  alarm condition  or, if it  is a
system detected  alarm, by  the operation  of a  key at  the MAP.
Visual alarms are cancelled by means of a key on the ACD.

6.09    A  dead  system  alarm  is  initiated  when  two  relays,
controlled by two Signal Distribution  (SD) points, both operate.
This indicates the loss of minimal call processing capability.  A
detailed description of the DMS alarm system will be found in NTP
297-YYYY-ZZZ.  Detailed procedures for dealing  with each type of
system alarm are found in the POP, NTP 297-1001-500.







                         DMS 100 FAMILY
        MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION
               (c) NORTHERN TELECOM LIMITED, 1978