NEC Univerge SV8100 Features And Specifications Manual page 368

Issue 11.0
To set Dial Block from another extension:
1. At the multiline terminal, press Speaker.
- OR -
At the single line telephone, lift the handset.
2. Dial 601 (default).
3. Dial the 4-digit Dial Block code (as set in programming).
4. Dial the extension number to blocked.
5. Dial 1.
Confirmation tone is heard.

6. Press Speaker or replace the handset to hang up.
To release Dial Block from another extension:
1. At the multiline terminal, press Speaker.
- OR -
At the single line telephone, lift the handset.
2. Dial 601.
3. Dial the 4-digit Dial Block code.
4. Dial the extension number to be released from Dial Block.
5. Dial 0.
Confirmation tone is heard.

6. Press Speaker or replace the handset to hang up.
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UNIVERGE SV8100
Code Restriction, Dial Block