On Fri, 17 Jan 1997, Adam Back wrote:

Steve Shear <azur@netcom.com> writes:

...

[very useful explanation of GSM TDMA, and the new HSCSD]

64 kbit/s tied to ISDN is very nice technology.

Does anyone use ADSL lines? or are they still very expensive?

...

ENCRYPTED GSM LINKS If the GSM phone includes a data port, as some already do, just connect your laptop, dial your ISP and 'push' the encrypted traffic over that link (e.g., using TCP/IP and PGPfone). [...]