AT&T 1030 - Manual (Page 50)

Using PBX, Centrex, or Custom Calling Features
If you have PBX, Centrex, or Custom Calling features, use them
exactly as their instructions describe with one important excep-
tion: Any non-
MERLIN system feature code that begins with
a “#” must be preceded by another “#”. For example, if PBX,
Centrex, or Custom Calling instructions tell you to dial
#1234
you must dial
##1234
to use the feature with your MERLIN system.
Similarly, when you program a PBX, Centrex, or Custom Call-
ing feature code beginning with “#” for Outside Auto Dial or
Speed Dial, you must enter “##” before you enter the rest of
the feature code.
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