Main Processing Board 4-7
Chapter 4: Board Installation
MBX IP Hardware & Installation Guide
NOTE: As needed, replace the batteries with the same or equivalent type recommended by the
manufacturer; the System will not function normally if the battery is replaced incorrectly. Be sure
to dispose of used batteries according to manufacturer instructions and/or local gov’t regulations.
LED Indications
NOTE: When several ISDN boards are installed, Default automatic clock priority of Slots and KSUs will
be as follows unless modified by the Admin. (PGM301):
•Boards - PRIB>Internal Clock
• KSUs
- 1st KSU>2nd KSU>3rd KSU
•Slot
- Slot 1>Slot 2>…>Slot 18
LED Indication (MJ1)
LED DESCRIPTION
LD1 (Blue), TMR Timer, Periodic Toggle — ON, 100msec; OFF, 100msec.
LD2 (Blue), CALL Call Task Status — ON, Call task activated; OFF, Call Task idle
LD3 (Blue), SYNC External ISDN Board Clock synchronization ON: PLL circuit activation by External Clock
from ISDN Board; MBX IP will be operated on the basis of external ISDN clock (refer to
“NOTE”). OFF: PLL activation by Internal Clock;
MBX IP will be operated on the basis of
internal clock.
LD4 (Blue), PWR System DC Power ON Indication – ON, Power ON; OFF, Power OFF
LED DESCRIPTION
1 (Green) Link Status LED – ON: Link OK, OFF: No Link
2 (Orange) Speed Status LED – ON: 100Mbps, OFF: 10Mbps
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