Nortel 1120E Administration Manual page 54

54 Configure the provisioning server
The "#" character at the end of the digit map causes the IP Phone 1120E to
dial the matched dialing plan immediately.
DRegex
The Digit Regular Expression (DRegex) syntax is a telephony-oriented
mapping of Portable Operating System Interface (POSIX) Extended Regular
Expressions (ERE). Users must take care not to confuse the DRegex syntax
with POSI EREs as they are not identical. In particular, there are many
features of POSIX EREs that DRegex does not support. The dialing plan
uses DRegex instead of ERE. The following rules demonstrate the use
of DRegex.
Copyright © 2008, Nortel Networks
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SIP Firmware Release 1.1 for IP Phone 1120E Administration
NN43112-300 02.03 Standard
27 May 2008