asterisk users - Dec 2007 - Problem with TE205P with TeleWest in the UK

Hi there,

    We've got a problem connecting Asterisk with a TE205P to a TeleWest 
E1 ISDN line in the UK.

    We get a lot of  "HDLC Bad FCS (8) on Primary D-channel" errors,
and
every so often the Primary D-channel goes down and all the calls got 
dropped.

    We've fully tested the card and made sure it's got its own IRQ.  I 
was just wondering if anyone out there has had similar problems with 
this provider, and if so, how they managed to solve them...

    Thanks for reading,

       Matt.