I have mine logged in on test@test since I received it and before plugging it in the wall plug (no reset from what I can see from my active connections to IRC):
Firmware Version: FAST2864_v6637F
Hardware Version: 2864-000000-002
After logging the modem with Bell's account, it upgraded right away to:
Firmware Version: FAST2864_v6740S
Rescue Version: FAST2864_v7637F
... And telnet kept working without having to repatch it!
Note that there was no rescue version before.
Here is a quick script for re-enabling telnet, if need be:
NEW=" (telnets\n (ports\n (0\n (port(23))\n (ssl_mode(none))\n (remote_access(0))\n )\n )\n )"
curl http://admin:firstname.lastname@example.org/save_rg_conf.cgi > $FILE
sed --in-place "s/$OLD/$NEW/" $FILE
curl --data-urlencode new_rg_conf@$FILE http://admin:email@example.com/replace_rg_conf.cgi