Nortel DMS-100 Series General Description Manual page 49

Table 1-4 Summary of ringing in peripheral modules (Sheet 2 of 2)
PM type RG PEC
UEN NTNP44
NTNP50
The following table provides a summary of NT2X27 ringing generator
parameters.
Table 1-5 Ringing generator parameters - NT2X27 (Sheet 1 of 2)
Ringing type
Bell (86 V)
Decimonic
Harmonic
Ring type supported
20 Hz single party
Coded
20 Hz single party
Coded
RG PEC Frequency
NT2X27AA 20 Hz
20 Hz
20 Hz
NT2X27AB 20 Hz
20 Hz
30 Hz
40 Hz
50 Hz
60 Hz
NT2X27AC 20 Hz
16.67 Hz
25 Hz
33.33 Hz
50 Hz
66.67 Hz
DMS-100 Family DMS-100 Ringing System BASE15 and up
DMS-100 ringing overview 1-33
Maximum lines ring
16 ADSL DMT Combo Line cards
per shelf/ 4 loops each for a total of
64 loops in shelf.
16 POTS line cards per shelf/ 32
POTS loops for a total of 512 loops
in shelf.
4 shelves per Universal Edge
equipment (UEE) frame
Voltage Maximum ring lines
-52 V dc 15
-40 V dc 15
+40 V dc 15
87 V ac 15
105 V ac 12
110 V ac 9
115 V ac 6
125 V ac 4
125 V ac 4
87 V ac 15
105 V ac 15
110 V ac 11
115 V ac 7
125 V ac 4
125 V ac 3