Installed Asterisk on a Raspberry Pi Wheezy Debian OS.

Super simple install process. Step 1:
apt-get update
apt-get -y install build-essentials
apt-get -y install sqlite3
apt-get -y install libsqlite3-dev
apt-get -y install asterisk

Step 2: Edit sip.conf based on SIP provider.

Step 3: Make a dialplan in extensions.conf and in 'asterisk -r' do a 'module reload'

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