NEC SL1000 Features And Specifications Manual page 141

ISSUE 1.0
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 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.
Features and Specifications Manual
SL1000
C
1-133