Deutsche Telekom T-Eumex 504PC SE - Manual (Page 84)

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Configuring the System
You enter numbers in the blacklist here as in the example depicted in the screen: no
connections are to be established from your communications system to the number
"0190." This blocks all 0190 numbers.
Example: In order to block 0190 numbers, you enter "0190" in the blacklist. All
attempts to dial them are aborted after "0-1-9-0." You can enter up to five numbers.
At the bottom of the three blacklist input screens there are preset telephone numbers
you can use to prefix the numbers you want to block (e.g. national code, network pre-
fix).
This enables the recognition of a blocked number appearing subsequent to the prefix
you have blocked. You can edit these entries as required. Enter a "#" (hash) as a wild-
card to stand for any digit.