NEC Xen IPK Programming Manual page 481

Xen IPK
N
This memory block is controlled by MB 4-57 if calls are to be CO or Telephone ring.
The Ring Patterns are shown in the table below:
4-55, CO Ringing Pattern Selection for Telephone Mode
0s 1s
Pattern
A
B
C
D
E
F
G
H
NIL
2s 3s 4s 5s
No Ring
Programming Manual
s= seconds
6s
DRAFT 3
Chapter 1 – 461