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New firmware versions for the ELSA MicroLink 56k can very simply be transferred to the modem via terminal software. Since the ELSA MicroLink 56k is provided with a so-called flash ROM, it is neither necessary to program an EPROM nor to replace components.
To conduct a firmware update requires, in addition to a new firmware version (file ML56K.UPX or ML56Kxxx.UPX), a terminal program which is capable of data transmission per X-modem protocol, as well as a version of the flash ROM loader program FLASH.BIN.
The new firmware version is transferred to the modem in a two-step procedure by file upload. In the terminal program the hardware handshake option (RTS/CTS handshake) must be activated. The highest possible speed should be selected (at the maximum speed of 115 200 bit/s, uploading the firmware file takes about 15 seconds). The precise firmware update procedure is described in the following listing:
Warning: The modem must ON NO ACCOUNT be switched off whilst the firmware file is being uploaded!
Terminal Modem message Comments
program
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at$upx Start firmware upload
#
| Flash loader upload
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| MicroLink 56k
| Copyright (c) 1997 ELSA, Aachen (Germany)
Please upload flash loader by X-modem now, (quit: 2*ctrl X)
FLASH.BIN ---> Upload the flash loader file using the X-modem protocol
#
| Flash ROM upload
|
| MicroLink 56k
| Copyright (c) 1997 ELSA, Aachen (Germany)
Please upload firmware by X-modem now, (quit: 2*ctrl X)
ML56k.UPX ---> Upload the firmware file using the X-modem protocol
Flash upload successful!
OK The firmware update is now complete.