CSD calls from Neo Freerunner

Al Johnson openmoko at mazikeen.demon.co.uk
Tue Jan 21 15:42:20 CET 2014

On Monday 20 January 2014 07:31:55 Michael Spacefalcon wrote:
> For those who don't know what CSD is:
> http://en.wikipedia.org/wiki/Circuit_Switched_Data
[snip test call logs] 
> CSD calls may be placed from a GSM mobile either to a land line or to
> another mobile.  (I don't know if it's possible to establish a CSD
> connection from a land line to a mobile.)

It's possible to establish the connection from land line to mobile, with both 
analogue and ISDN landlines. I used to use it for remote access to condition 
monitoring systems. You should be able to send and receive faxes too. It does 
need carrier support though.

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