Re: [hylafax-users] Accessing equipment information when receiving faxes

[John Warren <jwarren@xxxxxxxxxxxxx>]

I had a feeling that it was not going to be symmetrical although it  
seems strange that it would not be. But again sometimes to put  
strange things in "Standards" and I guess not being able to get the  
senders equipment type is just one of those things.

Thanks

John Warren

Network Operations Administrator
Prudent Rx Inc.



On Sep 19, 2007, at 1:33 PM, Lee Howard wrote:

> John Warren wrote:
>
> > Is there any way to access the equipment type/manufacture  
> > information when receiving faxes?
>
>
> No, not really... not like we can when sending faxes and examining  
> the receiver's NSF signal.  We have TSI, DCS, and maybe Caller*ID  
> to identify the caller... but that doesn't give us an indication as  
> to what equipment they're using.
>
> Some fax machines have certain kinds of fingerprints with how they  
> handle various portions of fax protocol that can be noticed by the  
> Class 1 driver... however, when I tried to apply that  
> fingerprinting approach to a large-scale production usage it  
> revealed that the fingerprinting correlations are very weak... and  
> thus quite useless.
>
> > When sending the information about the receiving equipment is in  
> > the qfile but I can't find any equipment information about the  
> > sending machine when we're receiving faxes.
>
>
> Info file usage as a receiver was just recently implemented in  
> HylaFAX+ (5.1.8) with CallIDType "calling-number" support.  This  
> feature requires you to have Caller*ID support on your modem and on  
> your phone line.  The purpose in putting it there was for the  
> senderHasV17Trouble and senderSkipsV29 features.  But this isn't  
> going to help you in your persuit of sender's hardware make/model  
> identification.
>
> > I'd like to be able to log that information so we can track down  
> > what machines are giving us errors when sending us faxes the way  
> > we do now when sending.
>
>
> You may want to examine the CallIDType "calling-number" feature to  
> see if maybe it could be extended in a manner that would assist you.
>
> Thanks,
>
> Lee.


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