NEC UNIVERGE SV8100 Features & Specifications Manual page 321

UNIVERGE SV8100
2. Dial 701.
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.
Code Restriction, Dial Block
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