Nortel DMS-100 Series General Description Manual page 45

United Kingdom ringing
United Kingdom ringing is ring type C3C, based on a total cycle time of 3.0 s.
Standard United Kingdom ringing is ring code 0, shown in the following table.
Table 1-3 Standard United Kingdom Ringing
Ring code
0
There are only ten different ring codes used in United Kingdom ringing. All
ten United Kingdom ringing patterns are described in the following figure.
ON OFF
0.4 s 0.2 s
DMS-100 Family DMS-100 Ringing System BASE15 and up
DMS-100 ringing overview 1-29
ON OFF
0.4 s 2.0 s