Archive for November 2008

CallWithUs launch UK based SIP server

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

Sipgatge trunk with Asterisk/FreePBX

I’ve used Sipgate for the past few years with my Asterisk box and have been pretty impressed.

For anyone else looking to use Sipgate with Asterisk/FreePBX here is my trunk setup

Trunk Name: Sipgate

PEER Details:

username=1234567
type=peer
secret=XXXXXXXX
qualify=yes
nat=never
insecure=very
host=sipgate.co.uk
fromuser=1234567
fromdomain=mydomain.com
dtmfmode=rfc2833
disallow=all
context=from-trunk
canreinvite=yes
authuser=1234567
allow=ulaw

Register String:

1234567:XXXXXXXX@sipgate.co.uk/1234567

If you are using NAT between your Asterisk box and Sipgate you will need “canreinvite=no” and “nat=yes” or you will probably get one way audio only on your calls

Edit: context changed to “from-trunk” to make the post clearer

UK based Asterisk VPS with FreePBX and A2Billing

Sysadminman is now offering UK based Asterisk VPS servers that have Asterisk, FreePBX and A2Billing installed and ready to use. These VPSs are hosted in one of the premier datacentres in the UK (BlueSquare) and have low pings to UK and the rest of Europe.

Asterisk and FreePBX combined make an extremely flexible and easy to manage “virtual telephone system” and A2Billing is a billing application enabling you to charge for calls made using your system if required.

Some possible uses of an Asterisk VPS are -

  • Small businesses wanting to manage a collection of SIP extensions
  • Reselling calling cards or VOIP termination
  • People who do a lot of traveling and want to stay in touch wherever they are
  • Route calls based on time of day, DDI, CLID, etc…
  • Provide contact telephone numbers in cities around the world all routed to your local phones over the internet
  • Voicemail to E-mail

See here for more details and have you have any questions please get in touch

Matt