NEC DS2000 Feature Handbook page 54

Central Office Calls, Placing
To place a call using a line or loop key:
1. Press the key.
2. Dial the outside number you want to call.
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The key will light green and you'll hear dial tone
from your outside line.
If you have Store and Forward enabled and are
using a loop key, the system will dial out your call 6
seconds after you dial the last digit. To avoid wait-
ing, dial # after dialing your last digit.
You may have a Private Line that is only on your
phone. Check with your Communications Manager.
Toll Restriction may prevent you from dialing cer-
tain outside numbers.
If you use a dial pulse line and wait 6 seconds
after dialing a digit, the system outdials any remain-
ing digits as tone (DTMF).