Nortel DMS-100 Series General Description Manual page 53

Table 1-7 Ringing generator parameters - NT6X60 (Sheet 2 of 2)
Ringing type
Synchromonic
Bell (105 V)
Note: Maximum number of ringing lines is based on three ringers for each line and a short loop length.
Each POTS 32 NTNP50 line card has a dedicated ringing generator. The
following table lists the characteristics of the on board ringing generator.
Table 1-8 Ringing generator characteristics - UEN
Characteristic
Input
Output
Zero crossing indicator
dc feed resistances
RG PEC Frequency
NT6X60AA 20 Hz
20 Hz
30 Hz
42 Hz
54 Hz
66 Hz
NT6X60AA 20 Hz
20 Hz
20 Hz
DMS-100 Family DMS-100 Ringing System BASE15 and up
DMS-100 ringing overview 1-37
Voltage
87 V ac
105 V ac
110 V ac
115 V ac
125 V ac
125 V ac
-52 V dc
-40 V dc
+40 V dc
Value
-48 V
86 Vrms at nominal 20
Hz, superimposed on a
dc offset equal to the talk
battery voltage
Frequencies of 25 Hz or
50 Hz are software
selectable
205 Ω nominal
Maximum ring line
24
8
9
9
9
Purpose
Input power
Ringing voltage output.
The ringing generator is
capable of ringing 15 VA
or 15 REN (ringing
equivalent number) at the
shortest loop length.
Coded ringing
Alternate output
frequencies
Indicates the output dc
voltage zero crossing to
prolong life of ringing
relays