Communication Manager supports a special type of extension on the Dial Plan called an enbloc extension. You cannot dial the numbers of an enbloc extension from an endpoint keypad. To reach an enbloc extension, use a short code version or a prefixed version of the number.

Customers with E.164 numbering plans often assign the full E.164 numbers as enbloc extensions. Enbloc extensions prevent routing conflicts between the full E.164 numbers and the short code keypad dialing inside a branch. Enbloc extensions are reachable by an incoming SIP INVITE, which is an enbloc where all digits arrive at one time. Therefore, no digits follow regardless of how the Request URI parameter is set or whether the Request URI parameter supports extra end-to-end digits or not.