Nortel DMS-100 Series Maintenance Manual page 24

1-8 Maintenance overview
Drawer state display
The status of the drawers appears below the status of the LCM units. The
drawers are numbered from 0 through 19 and grouped in pairs. The drawers
are grouped in pairs to show that the groups share the same BIC card and
normally interface a different processor. The processor can be odd or even.
An example of drawer status appears in the following display:
DRWR:
When the state of a drawer changes, the system updates the status display.
The system or the user can change the state.
The codes to display line drawer states at the MAP terminal appear in table
"LCM drawer states." This text uses standard abbreviations. This text does
not use code to describe line drawer states.
LCM drawer states
Code
I
M
O
S
–
Bus interface card
The BIC (NT6X54) is at the front of the line drawer, behind the front
faceplate. The BIC connects to the two LSGs (64 line cards) in the drawer
that contains the BIC. The BIC connects the two 32-channel LSGs to the
two LCAs and performs the following functions:
297–8351–550 Standard 04.01 August 1999
Example of a MAP response:
01 23 45
.. S. ..
(dot)
Scans line circuits for occurrence of a hook switch change or message
(description of dialed digits).
Sends signals through a ringing multiplexer to control the relays in the
power converter to select ringing and ANI/coin voltages.
Monitors line drawer activity for maintenance.
11 11 11
67 89 01 23 45
MM .M OO .. --
Definition (abbreviation)
In service (InSv)
In-service trouble (ISTb)
Manual busy (ManB)
Offline (OffL)
System busy (SysB)
Unequipped
11 11
67 89
SS I.