On 09/20/2011 03:43 PM, Adam Moffett wrote:
If I have a 4 port Digium FXS card and a single port PRI card on the
same asterisk box, is it expected that I'd be able to plug a fax machine
into the analog FXS port and have no problems sending or receiving
faxes? Our connection to the Telco is on the PRI obviously.

I don't recall the specific card models that we have, but I can check if
it matters.

Does the version of asterisk or Zaptel matter?

You need to be using DAHDI, not Zaptel, as there have been a lot of improvements in DAHDI as a result of Digium spending a great deal of time testing the exact scenario you outlined (and related ones). In addition, you need to be using a recent enough version of Asterisk to have the 'faxbuffers' configuration option available in chan_dahdi.conf, so that channels transferring FAXes can be configured with extra buffering to provide an insurance policy against timing slips.

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Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org

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