These numbers were accessible as late as Nov of 2012:

Telecomix Dial up Numbers:
 
Important: The Telecomix dialups are not secure and do not protect from wiretapping of your communications. It is still important to proceed with precaution and encrypt the data.
  
Note: Since the number of lines is limited, do not use them if you don't need to!
 
- French free isp FDN (about 100 lines):  +33172890150 (login/pass: toto/toto)
 
- German free Free.de (about 35 lines).   +4923184048 (login/pass: telecomix/telecomix)
 
- Swedish isp Gotanet (about 30 lines atm, can expand services) :  +46708671911 (login/pass: toto/toto)
 
- Belgium Edpnet:  +32022750640 (login/pass: free.edpnet/ free)  
 
- Netherlands Edpnet:  +31676002000 (login/pass: free.edpnet/ free)
 
- Netherlands  +31205350535 and the username/password are xs4all
 
Important links:
http://www.movements.org/how-to/entry/how-to-prepare-for-an-internet-connection-cut-off/