[geeks] Interconnect: Cell phone to house phone system

[Andrew Jones]

Fax over VOIP and fax over cellular are both fairly unreliable because 
both are heavily, lossily compressed.  Fax relies on sending data the 
way a modem does.  Removing data makes it work badly.

Fax over IP uses non-VOIP protocols to get the job done.  T.37 is a 
store-and-forward standard for Fax/email gateways.  T.38 is a codec and 
standard for real-time fax-over-IP.

The latter is much more common.  You speak T.38 fax-over-IP to your VOIP 
provider, and then they gateway you onto the POTS network.

On 09/25/2013 02:42 AM, Nick B wrote:
> FAX over cell works ok.
> FAX over voip does (generally) not.  Nor does Fax interact well with
> virtualization.
> So clearly, our corporate IT department virtualized our FAX voip servers.
> It worked *REALLY* well if you didn't want faxes.
> Nick