If you have a Asterisk system being used for sending and receiving faxes and all of the sudden the faxes all start failing with various error messages the first thing that should be checked is the status of either the analog telephone lines, the T1′s, or the SIP provider you are using as a outbound proxy. Below I describe some of the error messages that may be received via Hylafax in this example as well as how to check the status of the T1′s themselves to make sure that there are no alarms present before you have to get into troubleshooting Hylafax in detail.

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Earlier today I needed to scan in a receipt at the computer shop so I needed to configure the Brother MFC-5980CN all in one printer on my laptop. One of the things that always gets on my nerves about scanning in documents on most scanners is that by default it opens Microsoft Paint which is the worst application for image editing. Below are directions on how to modify the default application for scanning in images on the MFC-5980CN printer from MS Paint to Photoshop.

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ImageMagick is a really cool product. Not only is it open source but its very powerful tool. My goal was to figure out how to batch resize images while keeping one side 640 pixels wide. I ended up using ImageMagick’s mogrify by issuing the command below at my CentOS shell prompt.

mogrify -resize x640 *.jpg

or

mogrify -resize 640 *.jpg

Depending on which side you want to be 640 pixels. If you would like for image magic to make the largest side 640 and constrain the proportions use the following command.

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