ISDN-PRI Redirecting Number provides support for sending of the ISDN-PRI
Redirecting Number (RN) of the originally called party for e.g 0# transfers
out of PhoneMail to PRI Software Defined Network (SDN).
This feature affects only calls that are transferred out of applications
(e.g PhoneMail, Xpressions, or the new Multimedia Messaging Server (codenamed
"Saturn") using the official transfer CorNet-NQ procedure SS-SSCT to
ISDN-PRI trunk.