NEC SL 1000 Programming Manual page 224

SL1000/SL1100
Number
11
12
13
Conditions
None
Program
Feature Cross Reference
20
None
2-202
On : 0.25 / Off : 0.25 / On : 0.25 / Off : 4.25
On : 1.0 / Off : 3.0
On : 0.25 / Off : 0.25 / On : 0.25 / Off : 2.25
Ringing Cycle
Program 20 : System Option Setup
ISSUE 3.01