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krobertson

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We have a new sales potential and the customer has about 120 phones with 23 fax machines. They are an automobile dealer and rely heavily on their fax machines. Does anyone have any customers they have installed with a large fax operations? If so what hardware was used and how well did it work?

We are thinking of building a pure Asterisk box with a Digium T1 card and a 2400 card (fx0/fxs) ports. Then using asterisk to route the calls directly to the fax machine. Then we would use Operator to pass all calls from the asterisk box to Operator.

Thanks for any help,
Ken
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nhoague

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I would be certainly interested to hear anyone elses input.

We had a large install and ended up using a Cisco 8000 (I think) to handle the SIP accounts and convert to analog for faxing. It is about 25% accurate and most times faxes going out get returned with a poor signal quality or line noise.

Youd be better off keeping faxes on analog circuit IMO.
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fishtech

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Does your customer need faxes to be received on paper?

If not, is there a reason you cannot use Operator's on-board fax features?

We originally maintained 15 POTS lines dedicated to fax. They connected to serial cards on a 4SightFax server which distributed by email.

About 2/3 years ago we switched to Operator fax services and have not looked back. Each user can now send and receive faxes on their DID number.

We have dedicated 'Sales' and 'Company' fax numbers which send faxes via email to a group.

It has been a positive experience for all.

Having said that, our fax load is significantly lighter than it was 4-5 years ago, but I do not get many complaints from my 40 users about fax services.

ft.

[Updated on: Wed, 20 January 2016 16:51]

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nhoague

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So your users use the Operator MyPhone to send faxes? Do they ever get returns or bad quality? I'm wondering if its the Cisco SPA8000 over IP to Operator that is causing bad faxes.
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fishtech

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There were some complaints early on, but I have not heard anything recently.

I just double-checked with some users and they like it. But perhaps our fax volume and frequency may not be comparable to your load.

Do you know of any way to analyze faxes sent/received with/without success within a timeframe? That might help.

ft.

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krobertson

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They currently receive faxes on paper. We will try and get them to use the inbound fax to email.

I am more concerned about outbound faxing than anything. We have many ideas as to what equipment to use. We have other users on Operator and other VoIP products and the faxing on a small scale is working. But we are interested in larger Fax users and what they have used and their experiences.

thanks
ken
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Vladimir Toncar (Kerio)

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The fax protocols were originally designed for analog and ISDN lines, ie. for situations with low latency and low jitter. This is not exactly the case with VoIP, so the results depend a lot on whether you have a good internet connection and on how your SIP provider is handling faxes. When using HW fax machines, the recommendation is to to set the transfer speed to at most 9600 bps. If the SIP carrier does not support T.38, you should use G.711.
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