Archive for November 2008

CallWithUs launch UK based SIP server

*** UPDATE 23/6/09 – While callwithus still have a UK sip server you should use the server ‘sip.callwithus.com’ in your configuration settings. Check the callwithus website for details.

If you’re based in the UK or Europe and looking for a cheap ITSP (VIOP provider) it might be worth looking at CallWithUS as they’ve recently launched a UK based SIP server.

As well as the US based servers sip.callwithus.com, east.callwithus.com and west.callwithus.com you can now use uk.callwithus.com. I now get sub 6ms pings from my Asterisk server in BlueSquare to the CallWithUs server.

I’ve been using CallWithUs for a while now and they provide very competitively priced DIDs and termination rates.

UK based Trixbox and Elastix Virtual Private Servers

Sysadminman is now offering UK based Virtual Private Servers running Trixbox and Elastix.

Please see here for details – http://sysadminman.net/uk-voip-vps.html

CallCentric trunk setup with Asterisk/FreePBX

Here is my CallCentric configuration for FreePBX.

If you’re thinking about signing up with CallCentric please use my referral link here. Thanks.

Trunk Name: CallCentric

PEER Details:

username=1777XXXXXXX
type=peer
secret=PASSWORD
qualify=yes
nat=no
insecure=very
host=callcentric.com
fromuser=1777XXXXXXX
fromdomain=callcentric.com
dtmfmode=rfc2833
disallow=all
context=custom-get-did-from-sip
canreinvite=yes
allow=ulaw

Register String:

1777XXXXXXX:PASSWORD@callcentric.com/1777XXXXXXX

Please note: the above number starting 1777 is your account number and not you DID number

You also need to add 2 lines to one of the configuration files to correctly extract the DID number from incoming calls.

Edit /etc/asterisk/extensions_custom.conf

Add the following lines

[custom-get-did-from-sip]
exten => _.,1,Goto(from-trunk,${CUT(CUT(SIP_HEADER(To),@,1),:,2)},1)

Then restart Asterisk

You should now be able to create Inbound Routes based on you CallCentric DID numbers

CallCentric with FreePBX – free trunk setup

I’ve been using CallCentric as one of my SIP trunk and DID providers for several months now and it has worked really well. If you use FreePBX (or one of the prebuilt distributions that use it such as Trixbox, Elastix or PBX-in-a-flash) and use this link to sign up for a free CallCentric account I will configure your trunk in FreePBX for free.

Please use the contact form here if you would like to take up this offer.

Some of the services offered by CallCentric are -

  • US DID numbers from only $2.95/month
  • DID numbers in cities all over the world
  • US calls at only $0.0198 per minute
  • UK landline calls only $0.0198 per minute
  • Unlimited calling or pay-as-you-go plans