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Strata CTX670 Installation
Install Processor and Universal PCBs
4-44 Strata CTX I&M 06/04
PCB installation procedures in this chapter. Refer to the Strata CTX Programming Manual for
detailed programming instructions.
BCTU1A/BEXU1A Installation
This section explains how to install the new BCTU/BEXU processor PCBs into Strata CTX670
telephone systems. The BCTU/BEXU processor PCBs require Strata CTX Release 2.1, or higher,
software and CTX WinAdmin Release 2.1, or higher, software.
The BCTU can be installed without the BEXU for a maximum capacity of 192 ports. It supports
the Base and one Expansion cabinet. The BCTU by itself supports all the features and capacities
equal to the BECU/BBCU without the BEXS and BBMS expansion PCBs.
If the BEXU is installed with the BCTU, 672 ports are available, along with all the features and
capacities equal to the BECU/BBCU with BEXS and BBMS expansion PCBs.
The BCTU or BEXU do not have a built-in modem. The AMDS must be installed on the BCTU if
remote administration is required over telephone lines.
CAUTION!
• Do not remove the plastic insulation shield from the back of the BEXU PCB. If the
shield comes off, do not allow the back of the PCB to contact metal.
• The BCTU and BEXU PCBs are shipped from the factory with the battery jumper in
the “Off” position. Ensure it is moved to the “On” position before installing the
processor to protect customer configuration information stored in the processor RAM.
The battery will protect RAM for approximately six years. Otherwise, to conserve the
lithium battery, move the jumper to the “Off” position.
• When packaging the BCTU and BEXU PCBs, use only a nonconducting material
enclosure, such as plain cardboard. Conductive material can cause the internal battery
to discharge and erase memory in the BCTU and BEXU PCBs.
• Make sure that the power supply is Off when installing the BCTU and BECU PCB or
damage to the board could result.
• When removing the BCTU1A and BEXU1A, first detach the cable connecting the
BCTU and BEXU1A.