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Aria-34e
Digital Key Telephone System
Figure 9. MEMORY BACK-UP SWITCH
The MBU also has a four position DIP switches (SW1). The following shows the function of
each switch position:
Switch 4 System data base initialize when power on
- on : Initialize system data base when power on
- off : Do not initialize system data base when power on
Switch 3 Trace control (software testing purposes)
- on : Race function off
- off : Trace function on
Switch 2 SMDI function control
- on : SMDI function off
- off : SMDI function on
Switch 1 Administration protection control
- on : Enable administration programming
- off : Disable administration programming
Before programming the system, switch 4 should be placed in the ON position and the system
power turned OFF and then ON to initialise the system database to default settings. This can also
be carried out through PGM 00. Once the database has been initialised, switch 4 should be
placed in the OFF position to protect the database programming in the memory in the event of a
power failure. Refer to Figure 9.
There are also four red LED‟s on the MBU. Their function is as follows:
Aria Communications Pty Ltd.
A.C.N. 090 723 925
4-15
Installation
Rev 1.3
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