Specifications

December 2008 Page 7–5
Chapter 7. Maintenance Module
7
This is because the Maintenance Module stores
and maintains this information and sends it to the
rest of the system.
For instructions on setting the DS0 channel
assignments for the chassis’ channel modules and
enabling/disabling the PLOW, please refer to the
FCS online help facility (Channel Assignments
Map > Making Time Slot Assignments > To set up
the Channel Assignments Map).
For instructions on setting the real time clock,
please refer to the FCS online help facility
(Common FCS Procedures > Setting the Real
Time Clock).
For instructions on configuring the chassis’ opera-
tional modes, please refer to the FCS online help
facility (Setting the FOCUS Chassis Operating
Modes).
7.4 Specifications (MV2, MV3,
MV4, MV5)
The technical specifications for the MV2 & MV3
are shown in Table 7-1. MV4 & MV5 specs are
shown in Table 7-2.
The most significant differences of the MV5 over
the MV3 are:
• Second port (primarily used with the FCA
and supplied cable for rear DB-9
connector)
• Can be used in T1 or E1 systems
•Flash for storing system configuration and
operating system
•Works only with framer version TE1
7.4.1 Status Indicators (MV2, MV3)
The Maintenance Module has a total of 13 LEDs,
five on the main board and eight on the auxiliary
board (see Fig. 7-3 and 7-4).
The green/red status LED shows the module’s
status, with green indicating normal operation and
red indicating a failure. The status LED turns red
if the module:
1) Loses the synchronizing signals from the
Framer Module.
2) Detects a NOVRAM error not resulting
from a signaling map failure.
3) Detects a signaling map failure due to a
NOVRAM error or a DX chip error.
4) Detects an I/O chip error on the main
board.
Also, whenever the status LED turns red, the
module issues a system alarm, which is sent to all
modules in the chassis.
The other four LEDs on the main board are in two
sets of two LEDs. The upper two LEDs, labeled
TX DATA and RX DATA, are lit to indicate when
the module is transmitting (TX) or receiving (RX)
data via the RS-232. The lower two LEDs report
the module’s synchronization status. The left LED
indicates, when lit, that the direction of timing is
“east” (1-1) and, when not lit, that the direction of
timing is “north” (2-1). The right LED indicates,
when lit, that the module is a master, synchro-
nizing on its own internal clock, and, when not lit,
that the module is a slave, synchronizing to a
received T1 signal.
Figure 7–4. Maintenance Module (MV3)
Auxiliary Board Status Indicators.
The LEDs on the module’s auxiliary board are
shown in Fig. 7-4. These eight LEDs, beginning at
the top left, are as follows:
SWTEST – This red LED, when lit, indicates a
user has remotely logged onto the module (i.e., the
SIGNALING
BUTTON
HANDSET
INTERFACE
COMPONENT SIDE
SOLDER SIDE
SF SYNC
DISABLED
LOCKED
SWTEST
UNLOCKED
FLIPPED
RECEIVE
SEND
ARMED