Re: flexfax: Blocking toll numbers

[Nico Garcia <raoul@cirl.meei.harvard.edu>]

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On Wed, 29 Oct 1997, Trevor Blackwell wrote:

> 
> Does anybody know how to block calls to expensive toll numbers? We
> provide faxing of orders received from customers web sites, and I want
> to protect against someone entering expensive toll numbers.
> 
> As I understand it, not just 1-900 numbers, but some numbers in 1-819
> and other area codes can be arbitrarily expensive. If there were some
> finite list of bad numbers, that would be great.

Hmmm. One could add some filtering into the etc/dialrules file to turn
such numbers into your local fax number: this would let you track when
people do this....

Depending on your local phone system, it may also be possible to block
at the telephone. Many office systems, for example, require some sort
of permission to make long distance calls.

			Nico Garcia
			Engineer, CIRL 
			Mass. Eye and Ear Infirmary
			raoul@cirl.meei.harvard.edu


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