Karel EVM38S Technical Reference And User's Manual page 12

EVM Modules of the MS Series Technical Introduction and User's Guide
Thanks to the two minutes (130 secs) of Flash Memory capacity it has, it
functions as the auto attendant (Automatic Call Distributor). Since no DRAM
memory is present on it as factory default, the voice mail message feature
becomes available only by adding an EVM-DL.
The module has been designed in a structure so that it can be directly
integrated onto the exchange. There exist 5 capacity expansion slots on the
card. Two of them are used for EVM-FL, and three of them for EVM-DL.
EVM48 is presented to the user together with the brass card holders to be
used during mounting.
Dimensions: 18 cm x 8.8 cm x 3.2 cm
Weight: ~0.2 kg
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