carrier grade fax boards?

Faisal Imtiaz faisal at
Thu Apr 28 11:02:03 UTC 2016

When you use the terms 'SIP' and 'Fax/Board' in the same sentence, it sort of becomes an oxymoron.

In the analog world, we used to use 'Carrier grade' Fax/boards made by BrookTrout which was then acquired by Dialogic. (Truefax line), and there were a couple of others.. mostly these were cards with large amount of DSP's used for fax processing multiple channels on digital links (BRI/PRI/T1's etc).

Since SIP is a 'communication protocol' which works with IP, there is no need for 'Fax/Board', since all everything needed can be done via software. The only reason one may need Hardware is to convert SIP to traditional TDM (POTS line or PRI/T1/E1 etc). Most of us are used to referring to these devices as IAD's.

Having said that, what are you looking to do ? Traditional TDM fax or SIP based FOIP ?



Faisal Imtiaz
Snappy Internet & Telecom

----- Original Message -----
> From: "Ryan Finnesey" <ryan at>
> To: "Valdis Kletnieks" <Valdis.Kletnieks at>
> Cc: "nanog list" <nanog at>
> Sent: Thursday, April 28, 2016 2:41:23 AM
> Subject: RE: carrier grade fax boards?

> Fax hardware/boards that other members have used  within service provider
> environments to deliver services to their end users .
> -----Original Message-----
> From: Valdis.Kletnieks at [mailto:Valdis.Kletnieks at]
> Sent: Thursday, April 28, 2016 2:36 AM
> To: Ryan Finnesey <ryan at>
> Cc: nanog at
> Subject: Re: carrier grade fax boards?
> On Thu, 28 Apr 2016 04:30:23 -0000, Ryan Finnesey said:
>> I was wondering if anyone had any recommendations on carrier grade fax
>> boards that are SIP based?
> What would "carrier grade" even *mean* for a fax board?

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