Customer Service and Booking Hotline: +44 (0) 845 672 0175



Answer Message

An ISUP (ISDN User Part) signalling message sent by the destination switch indicating that the endpoint is now in the off hook position ie the telephone has been picked up.

Bookmark this glossary item

Share this item using the following sites:

Courses by category...

Glossary Search

Newsletter Sign-up

Our RSS Feeds...