                               COMPOSE BINARY
 
Envoy 100 supports the transfer of binary (8 bit) files using the XMODEM
file transfer protocol. Both CRC and CHKSUM versions of XMODEM are
supported.
  
If COMPOSE BINARY is entered at the Command? prompt the user is required to
enter the TO, CC, BCC and Subject fields as well as text (if any) in the
same manner as the COMPOSE script. However after entering '[.cr]' to end
the text input the user is then prompted for:
  
File Name: (up to 20 characters) and
File Format: (up to 20 characters).
  
These fields are labels which can be used to identify the binary file that
follows. They can be left blank by entering [cr].
  
After entering the 'File Format:' the user is prompted to 'Initiate
Transfer' (send BREAK to cancel). At this point the user must invoke the
XMODEM file transfer from their computer to send a binary file to Envoy
100. The exact manner in which XMODEM is invoked depends on the
communication software being used and the documentation for that package
should be consulted for this information.
  
After the file is transferred the user will receive a summary status line
from Envoy and can then send, edit or save the message in the same manner
as currently allowed. The restrictions on editing binary attachments are:
  
1) A binary attachment is stored as a single line in the workspace. 
  
2) The binary attachment itself cannot be modified.
  
3) The File Name: and File Format: text can be edited like any other text. 
   However any attempts to edit the labels themselves will result in the 
   edit command being cancelled.
  
4) The line(s) containing the binary attachment can be copied, deleted and 
   moved in the same manner as a text line(s).
  
If the XMODEM transfer fails or is cancelled for any reason, the user is
informed with a system message and is returned to the Command? prompt. The
message with the (incomplete) binary attachment will not be posted.
  
The XMODEM transfer can be cancelled by issuing a BREAK from the
communication software package. Please consult the documentation for your
communication software for the details on cancelling an XMODEM file
transfer.
