Install asterisk on ubuntu (apt-get)
If you don’t want to compile asterisk on ubuntu and you are already using a debian based system like ubuntu,
you can just apt-get asterisk
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install astersisk
Asterisk security : ACL not respected on SIP INVITE
A missing ACL check for handling SIP INVITEs allows a device to make calls on networks intended to be prohibited as defined by the “deny” and “permit” lines in sip.conf. The ACL check for handling SIP registrations was not affected.
http://www.asterisk.org/security
Asterisk and others PBX monitoring
Here is a great tool to monitor your web services as well as your public phone services
Asterisk: send and receive fax
You may have search all over the internet about a reliable way to send and receive fax using
asterik and a voip connection or your TDM/T1 card you already have.
Digium have a solution for you.
http://store.digium.com/productview.php?product_code=804-00007
Check their free fax product. Register and install it.
You can use it for free if you need only one conccurent channel. This may be all you need if you have only one outbound line anyway or expect only on fax at the time.
For multiple channels, the pricing is as low as 39.99$