Samsung OfficeServ 7400 Technical Manual page 32

OfficeServ 7400
TECHNICAL MANUAL
3.3.2 Replacing Boards
If the OfficeServ 7400 system fails to operate normally due to an error on the power
supply board, control board, or interface board, replace the board with a new one.
Removing Cables
Replace a board after removing all cables connected to the board.
The procedure for replacing a board installed in a slot of a cabinet is as follows:
POWER TO THE CABINET MUST BE TURNED OFF. Failure to do so will
damage the card, cabinet and/or corrupt the data moving along the data bus.
1) Turn off the power of the cabinet.
2) When replacing an MP40 or LP40 board, first, remove link cables connecting the
MP40 board to the LP40 board. Also, remove all other cables connected to the
board to be replaced.
3) Pull the lever of the board and pull the board out slowly.
4) Align the new board to the guardrails of the slot and slide into slot. Push the front
panel lever of the board until it is completely inserted into slot.
3.3.3 TEPRI/TEPRIa/TEPRI2
The T1E1PRI(TEPRI/TEPRIa) board is a digital trunk interface that supports either T1 or
ISDN PRI service. It also supports Q-Sig/PRI signaling required for networking multiple
systems.
The TEPRI/TEPRIa board installs into any universal slot. The first TEPRI/TEPRIa card
installed in the OfficeServ 7400 is the primary source of external clocking. The second
TEPRI/TEPRIa installed is the secondary source of external clocking. Default clock
selection is first cabinet, left to right then second cabinet. The clock priority can be
changed by using MMC 826. The primary and secondary clock sources should be
mounted in the main cabinet to ensure stable reception of clocking from the primary
and secondary sources. Regardless of position, a CO PRI circuit should always be
given clocking priority over T1 circuits. There are two RJ45 modular jacks on the face of
the card. The settings for T1 or PRI service are selected by a bank of dip switches as
defined below. The PRI supports NI1, NI2, AT&T No. 5 ESS, and DMS 100 offices.
Install as many TEPRI/TEPRIa cards as needed into any available universal slot. There
3.17
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INSTALLATION
PART 3 JUNE 2006