Dual Ring Tone When Dialling Out

Hi

When we call out on our phones, we get an international ring tone (single) and the UK dual ring tone at the same time. On normal phones, when we ring out here in England, UK, we get a dual ring which indicates the phone is calling out.

We are using AsteriskNow 2, Freepbx 2.11 and Digium TE122 card. All the modules are upto date.

I cant find anything on the net or on this to explain this phenomena.

Thanks
Shanni

Just to clarify on this, when we dial out, there are two distinctive ring tones going out. One is the normal dual ring tone which is common, however we also get a ring tone dialling out similar to an international tone.