Total Access 850 System Manual
Section 5 DLP-16
64203376L1-1B
© 2004 ADTRAN, Inc.
263
2.
Alarm relay contacts are open during normal operation. The alarm relay contacts close in the event of
a local alarm condition or the receipt of an alarm from the T1 Carrier.
3.
In a carrier alarm condition such as a Red, Yellow, or Blue (unframed all 1s), various alarm contacts in
the PSU close.
4.
Carrier alarm conditions cause the Total Access 850 to initiate trunk processing. The following chain of
events then occur:
•
MJ will be directly shorted to MJR.
•
MJV will be directly shorted to MJVR.
5.
Contacts MJ and MJR can be overridden manually during an alarm condition by pressing the ACO
pushbutton on the PSU faceplate.
6.
If the 3-Amp power fuse on the PSU trips, the -48 ALM relay will close, providing a -48 VDC signal on
that pin. This alarm cannot be overridden by the ACO pushbutton. Refer to the table below for alarm
notifications.
Alarm Condition
Relays Activated
MJR
MJVR
-48 ALM
RED ALARM
X
X
YELLOW ALARM
X
X
AIS ALARM
X
X
PSU POWER FUSE FAILS
X
X
X
ALARMS ACO
DEACTIVATES
X
X
Note: ACO will not deactivate MJR after a power fuse
failure.
P7
P6
P5
Summary of Contents for Total Access 850
Page 14: ...Table of Contents Total Access 850 System Manual 14 2004 ADTRAN Inc 64203376L1 1B ...
Page 16: ...Section 1 System Description Total Access 850 System Manual 16 2004 ADTRAN Inc 64203376L1 1B ...
Page 22: ...Section 1 System Description Total Access 850 System Manual 22 2004 ADTRAN Inc 64203376L1 1B ...
Page 224: ...Section 5 DLP 4 Total Access 850 System Manual 224 2004 ADTRAN Inc 64203376L1 1B ...
Page 232: ...Section 5 DLP 6 Total Access 850 System Manual 232 2004 ADTRAN Inc 64203376L1 1B ...
Page 236: ...Section 5 DLP 7 Total Access 850 System Manual 236 2004 ADTRAN Inc 64203376L1 1B ...
Page 244: ...Section 5 DLP 10 Total Access 850 System Manual 244 2004 ADTRAN Inc 64203376L1 1B ...
Page 252: ...Section 5 DLP 13 Total Access 850 System Manual 252 2004 ADTRAN Inc 64203376L1 1B ...
Page 256: ...Section 5 DLP 14 Total Access 850 System Manual 256 2004 ADTRAN Inc 64203376L1 1B ...
Page 264: ...Section 5 DLP 16 Total Access 850 System Manual 264 2004 ADTRAN Inc 64203376L1 1B ...
Page 278: ...Section 6 ADTRAN Utilities Total Access 850 System Manual 278 2004 ADTRAN Inc 64203376L1 1B ...