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STEP
1 - Download a Softphone
A
softphone is not necessary but it will simplify testing procedure
quite a bit. One of the best out there is X-Lite.
Follow the installation instructions.
STEP
2 - Open a SIP Account
This
is like signing up with a cell phone carrier except that there
aren't crazy contract commitments. There are many SIP providers
out there. If there are setup fees I'd look the other way.
Usually they'll let you get started with a small balance transfer
from a PayPal account or a credit card. I'm talking about
just a few bucks. Some will even allow you to make free calls
for testing purposes.
One
thing that's very different from signing up with a cell phone
company is that when you open a SIP account you get the ability
to call and receive calls from other SIP users (similar to
Skype to Skype) and the ability to call regular phones (termination).
If you want to be able to receive calls from regular phones
you need DID which is billed separately and can be actuated
through another provider. More about this later.
Check
out the rates for the places you will be calling. Remember
that switching providers later is very easy.
I
ended up testing several providers. Cheapskates may want to
consider www.voipcheap.com
They offer "free" calls to select countries and
overall cheap rates. The way the "free" calls work
is somewhat complicated. You make an initial payment of €10.
After that you can call for free for 90 days. After 90 days
they start applying standard rates to your calls and depleting
your balance. At that point you can sink in another €10
and start a new 90 day period.
The
thing that bugs me about voipcheap is that you have to download
and install their Skype-like softphone in order to create
a SIP account. Their softphone is absolutely non-essential.
It's just a hassle. I downloaded it, installed it, wrote down
my SIP account information and uninstalled the software.
Another
provider worth mentioning is www.callwithus.com
They have a nonsense-free setup and a very functional web
interface used to configure your account settings. The rates
are pretty low too. You can setup multiple numbers (SIP user
names) under one account for no extra charge.
Explore
other options your provider may offer such as voice mail,
conference calling, etc.
STEP
3 - Setup Softphone and Make a Test Call
Whichever
service you sign up with they'll provide you with standard
information used to setup your softphone/hardphone. For example
voipcheap SIP information is as follows:
| SIP
port |
5060
|
| Registrar |
sip.VoipCheap.com |
| Proxy
server |
sip.VoipCheap.com |
| Outbound
proxy server |
leave
empty |
| Account
name |
your
VoipCheap username |
| Password |
your
VoipCheap password |
| Display
name/number |
your VoipCheap username or voipnumber |
| Stunserver
(option) |
stun.VoipCheap.com
|
In
most cases it comes down to just the parameters in bold text.
Let's
setup X-Lite for use with callwithus. Assuming that you have
already opened an account and have your user name and password
available start the X-Lite and click on the triangular icon
button top left [Fig 2].

Fig. 2 X-Lite Menu Button
Choose
"SIP Account Settings" and click on "Add."
Use this information
from callwithus to complete your settings. Substitute your
user name and password. "Display Name" is like a
caller ID for SIP-to-SIP calls. "Authorization User Name"
should be the same as your "User Name." Note that
user name is different from your callwithus account number.
The user name is like your telephone number and callwithus
allows you to have more than one user name under a single
account.
When
done click on "OK" and "Close" to get
back to your X-Lite panel. The phone will connect to the server
and say "Ready." Test it by calling yourself. Because
the SIP server doesn't necessarily know where you are you
always have to dial the country code first. To call a U.S.
number (202) 555-1212 you'd have to dial this sequence: 12025551212.
1,
2,
3,
4, 5,
next
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