[Asterisk-Users] How does Vonage support fax machines?

[Jay Milk]

Vonage's fax is useless.  I've tried four or five different fax devices
(several modems and two different fax machines), and not only was I
unsuccessful, but I also got their support's "We don't support... XXX"
reply every single time.  When asked which device they DO support, the
replies ceased.   When asking for a refund on the activation fee and
monthly fees for the fax-line, I was asked to contact tech-support to
work out any problems.

Jay -- Vonage-free for 9 months now.

> -----Original Message-----
> From: Deon [mailto:mr_e_glitch at yahoo.com] 
> Sent: Tuesday, July 05, 2005 9:32 AM
> To: Asterisk Users
> Subject: [Asterisk-Users] How does Vonage support fax machines?
> 
> 
> My boss is insisting we support fax, and I keep telling him 
> that Fax over IP is very unreliable and not recommended and 
> his immediate come-back is "Vonage does it." and it's very 
> hard to figure out how.
> 
> I don't think Vonage does T.38, the Linksys/Sipura units 
> they're using doesn't support T.38 to my knowledge. 
> 
> That means they have to be using G.711Ulaw to send faxes. But 
> how do they compensate for packet loss/jitter/etc.
> 
> In our test lab, the best we could get was 90% success at 
> sending faxes. It seemes to screw up the longer the 
> transmission, ie page 1 was usually ok, but page 2 and 3 and 
> 4 was at serious risk. So if I bought a Vonage adapter, can I 
> send a 30 page fax? My best guess is they have high quality 
> voice T1's, like from an ILEC, usually more expensive, and 
> when they sell a "Fax Line" I noticed it's more expensive. 
> Maybe they route all their fax calls specifically out these 
> high quality T1's that they own, so that they can do some 
> type of quality control.
> 
> My test lab was a private network, a Cisco 3640 connected to 
> a local voice PRI T1, and converting to SIP. Asterisk would 
> push the calls to the Cisco 3640 and the Linksys PAP2 would 
> register with Asterisk. All local. I then tried several test 
> faxes throughout the PSTN. Would it be better to plug the 
> voice T1 straight into Asterisk using one of Digium's cards? 
> 
> 
> 		
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