SIP

Here are some links you may find useful.

AVAYA IP Office is one of the leading telephone systems in the UK.

If you are looking for a new Telephone System, please click this link - Telephone Systems .

For information on ISDN30, click here - ISDN30

For information on ISDN2e, see ISDN2e

For help with all aspects of sales training this is a truly excellent site and well worth investing some resource - Sales Training

For web design and hosting, check out Blue Planet Internet Solutions here - Web site design Sussex