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3-20 Ringing in Series II peripherals

297-1001-131 Standard 06.01 October 2000

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.

XOVER

CUR

RMS

ACT

XOVER

CUR

RMS

ACT

Ring

generator 0

Ring

generator 1

Processor

SPOL

SVOLT

SCOIN

SRG

PWRACT

MPWACT

Power

converter

10A

12A

14A

16A

18A

20A

11A

13A

15A

17A

19A

21A

46A

46B

47A

47B

49A

42A

42B

43A

43B

45A

45B

Power

converter

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