Asterisk in UK


I own a small business, and would love to use asterisk as my PBX.

Currently I am using a couple of BT telephone lines and normal BT phones, I want to expand my telephone system to allow calling between staff and having an IVR with call queues.

I have done some reading around and played a little with asterisk using soft-phones with a VOIP provider. However I want to use BT ISDN lines, and have no way of playing around with them to get them to work as I wanted.

I have had a quick google, but cannot find any good guides/advise about setting up asterisk in the UK to work with ISDN lines.

I was wondering if anyone has any advise that they could give to ensure that I can set up my PBX without too many hic-ups!

Ideally my setup will be as follows:
2xISDN lines (4 channels) supplied by BT (and room to expand to more channels if needed)
A range of telephone numbers purchased from BT
6x Internal telephones (I haven’t decided on a brand)

I have a good understanding of how to set up the features of the handsets and internal dialplan within asterisk; however I have no idea how to set up BT isdn lines or the hardware.

I was thinking of purchasing something like OpenVox B400E ISDN BRI PCI-Express, or OpenVox B400P 4-port ISDN BRI PCI to connect the PBX to the BT ISDN lines.

Any help or advise would be greatly appreciated

best wishes


When I changed my email address, the system made me change my user id,

If anyone is going to reply, please reply on this post and I will get notified to my new address.



Well, if you choose OpenVox hardware, the best place to ask advise is on their forum.
Their manuals are pretty good.

In short, yes it is possible to have 2 isdn lines comming in.

The hicups will depend on your knowledge.