AMT-70/AMT-73/AMT-75 Installation and Operation
5.11.1 Downloading from the RS-232 Serial Port
If Ethernet is not available (typically if the modem is in the field) the RS-232 serial port can be used for
software download using the Zmodem protocol. The Zmodem protocol sends data in 512 byte blocks
and uses cyclic redundancy checking to transmit and check the data. Uploading files from the modem
to the computer is allowed as well.
TERMINATING THE UP/DOWN LOADING
The computer's serial port should be configured for 19200/N/8/1. Any communication software that
allows the Zmodem protocol may be used. To get help for the wrapper program for the Zmodem
transfer, enter the following at the prompt:
# zdw -h
The help Response will be as follows:
-F filename
-f pass xon/xoff flow control to remote control
-j receive files by Zmodem protocol
-a use ASCII mode
-k send files by Zmodem protocol
DOWNLOADING FILES
Enter at the prompt, #zdw -j for a binary file, or #zdw -a -j for an ASCII file to download them. A
filename is not necessary since the file name has been selected at the computer and will be sent along
with the data.
UPLOADING FILES
Enter at the prompt, #adw -k -F filename for a binary file, or #adw -a -k -F filename for an ASCII file to
upload them. The computer should have already been set up to receive files.
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To terminate the upload or download, the user enters CTRL-C and then CTRL-A. The termination may
be made at any time during the process.
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