From as much analysis as I have been able to complete, I believe that the CT-301 is nothing more than a reworked CT-300 (some lights on the front got changed but I believe that the base hardware is the same [no proof though]). The CT-300 & the CT-500 share many features and also a common firmware upgrade file. I have used one of said firmware upgrade files to upgrade a CT-301 and it appeared to be working afterwards. The CT-301 as released from Aliant has a default IP address of 10.0.0.1. To access the modem, you need to connect a crossover cable from the modem to a network card in your computer. Then you need to setup the TCP/IP properties for your network card as follows:
IP Address: 10.0.0.3
Subnet Mask: 255.255.255.0
Once you have applied those settings, you need to open a telnet session to the router.
Then it will ask for a username and password combo. (I will not go into details about the pain I went thru to tease the correct password out of the device, but here it is).
That will get you root access thru the FTP interface. You should then go to Configuration and HTTPD and set it to Enabled to re-enable the web based configuration which Aliant turned off for some brilliant reason.
You can then save the changes and exit the telnet session.
Now you can browse to 10.0.0.1 with your web browser of choice and logon. For read only access use user/user otherwise use root/RM60008 for root access. I recommend the web interface over the telnet one for ease of use.
Note the web configuration dialog has a nice statistics page allowing you to check line quality and such while online with the modem.