Feature #5730
openFax over GSM support
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Description
After CSD support is implemented (#4395) we could actually look at Fax over GSM support.
According to TS 43.045 it seems to use a synchronous CSD bearer and then send custom 64-bit frames inside it, encapsulating the Fax "application layer" protocol.
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Related issues
Updated by laforge 5 months ago
- Due date set to 02/14/2020
- Start date changed from 10/27/2022 to 02/14/2020
- Follows Feature #4395: Circuit Switched Data (CSD) Support in osmo-mgw added
Updated by laforge 5 months ago
misc note: I've just ordered two GSM Fax machines (Possio Greta) which currently are available inexpensively. So if the time comes, we do have two machines.
Once synchronous CSD is supported, mobile-to-mobile fax might actually just work. The IWF on the MGW is only required for GSM-Fax <-> landline-FAX interworking.
Updated by shadowcaster 6 days ago
note: Possia Greta has Siemens module inside, for GSM faxing you may also consider to acquire Nokia 30 GSM Connectivity Terminal, which were more or less common back in the day. Perfect for faxing and CSD/HSCSD. Another pretty common device with fax/csd/hscsd support is nokia 9300/9300i/9500 communicators, they have enough resources to send and receive faxes as images.
Updated by laforge 5 days ago
For the record: bursts_csd_9600_t_fax_mo_gplv2.dat cocntains a burst_ind recording of a Fax call on TCH/F9.6 (transparent) between a Racal 6103 and a Siemens BGS2-W modem.
