Wow, zmodem! Are you sure you don't actually want ymodem-g? Back when I was file-trading on my 9600 bps modem, ymodem-g was considerably faster than zmodem. The chief advantage of zmodem, fast error-correction, doesn't apply to TCP connections like telnet which are error-free already. Some versions of ymodem even let you chat with the sysop during file-transfers!

Ahem, where was I? Ah yes, we're in the year 2006! What the heck are you using zmodem over telnet for?

Here's a few alternatives to consider:

• FTP
• SCP
• rsync
• Sending the file base64 encoded over the telnet link. You can decode it on the other end using Perl or a stand-alone base64 decoder. This is how stuff like Emacs' tramp-mode works for example.

Any of these will probably be easier to implement than trying to jury-rig zmodem to transfer files via Net::Telnet.

-sam

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