Nortel DMS-100 Series General Description Manual page 88

3-20 Ringing in Series II peripherals
RMS
This normally low bit goes high to indicate a low ringing voltage condition.
This occurrence indicates a trouble condition to which the system will
respond.
ACT
RG 0 provides ANI/coin voltages to the even-numbered units (unit 0 of both
LCMs) in the LCE frame. RG 1 provides ANI/coin voltages to the
odd-numbered units (unit 1 of both LCMs). The ANI/coin trouble (ACT) bit is
normally low and goes high when a problem occurs with any of the ANI/coin
voltages.
If all four units in the LCE are in-service and the ACT bit of RG 0 goes high,
the even-numbered units are system-busied (SysB). This action causes the
odd-numbered units to go into takeover mode and sets them to an in-service
trouble (ISTb) state. If the ACT bit to RG 1 then goes high, ANI/coin functions
are disabled, but other calls continue to be processed by the ISTb units.
Figure 3-7 Status and control bits for LCM ringing
Note 1: The pin numbers shown in the previous figure are located on the
back of the ringing generator.
Note 2: The signals shown in the previous figure are distributed to all four
processor cards in the LCE frame; only one processor card is shown here for
clarity.
297-1001-131 Standard 06.01 October 2000
7
XOVER
F0
1
F1
3
Ring
CUR
11
generator 0
RMS
9
ACT
5
7 XOVER
F0
1
F1
Ring
3
generator 1
CUR
11
RMS
9
ACT
5
10A 46A
12A 46B
14A 47A
16A 47B
18A 49A
20A
Processor
11A
13A
15A
17A
19A
21A
42A
SPOL
SVOLT
42B
SCOIN
43A
Power
SRG
43B
converter
PWRACT
45A
Power
converter
MPWACT
45B