Samsung OfficeServ 7400 Technical Manual page 33

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 is
no limit to how many TEPRI/TEPRIa cards you can add to the system. NOTE: Do not insert
this card with system power ON.
3.17
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INSTALLATION
PART 3 MAY 2010