NEC Neax 2400 Imx Circuit Card Manual

CHAPTER 3 ND-70182 (E)
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Revision 4.0
PH-CK16
Phase Lock Oscillator
The source clock of the clock subordinate office is either the digital clock supply (DCS) or the digital interface
clock (DIU0 - DIU3). When clock source failure has occurred, the PLO chooses another clock source
automatically in the order of:
1. DCS
2. DIU0
3. DIU1
4. DIU2
5. DIU3
6. PLO changeover or the PLO internal oscillator drifting
The PLO can output the clock signals (CLK) and the frame head signals (FH) as follows:...

ND-70182 (E) CHAPTER 3
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PH-CK16
Phase Lock Oscillator
The MUSIC ROM located on this circuit card also contains the hold tone, and is supplied to the TSW circuit
card. When an external music on hold is applied to the 4 IMG system, this circuit card provides the interface for
the external hold tone source.
Figure 3-6   Music Source
SELSEL
SEL
Speech Path Memory
for Music/Tone
Music/Tone
MUSIC ROM
TDSW00PLO#0
TONE ROM
SELSEL
SEL
Speech Path Memory
for Music/Tone
Music/Tone
MUSIC ROM...

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PH-CK16
Phase Lock Oscillator
2. Mounting Location/Condition
This circuit card is mounted in the TSWM of the slot shown below.
3. Face Layout of Lamps, Switches, and Connectors
The face layout of lamps, switches, and connectors is shown below.
Figure 3-7   Face Layout of PH-CK16 (PLO)
Mounting ModuleTSWM
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 1920212223PLO 0 PLO 1
1   2  3  4  
1   2    
SW8F
SWAC
SWAB
MB ACT
1   2  3  4  5  6  7  8 
MJ
MN...

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PH-CK16
Phase Lock Oscillator
4. Lamp Indications
Lamp indications for this circuit card are shown in the table below.
5. Switch Settings
Standard settings of switches on this circuit card are shown in the table below.
LAMP NAME COLOR STATE
AC TGreen Remains lit while this circuit card is in active state.
Off Remains off while this circuit card is in stand-by state.
MJ RedLights when the following MJ fault has occurred: 
All of the clock supply routes have...

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PH-CK16
Phase Lock Oscillator
SWITCH 
NAMESWITCH
NO.SETTINGSTANDARD 
SETTINGMEANING
SW011ON×Clock subordinate office.
OFF Clock source office.
2ON Digital Clock Supply route zero (DCS 0) is used.
OFF Digital Clock Supply route zero (DCS 0) is not used.
3ON Digital Clock Supply route one (DCS 1) is used.
OFF Digital Clock Supply route one (DCS 1) is not used.
4ON8 KHz of Frame Head signals are not extracted from the DCS 
signals (which is composed of 64 KHz + 8...

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PH-CK16
Phase Lock Oscillator
SWITCH 
NAMESWITCH
NO.SETTINGSTANDARD 
SETTINGMEANING
SW021ON DIU 0 is used as the DTI clock supply route zero.
OFF DIU 0 is not used.
2ON DIU 1 is used as the DTI clock supply route one.
OFF DIU 1 is not used.
3ON DIU 2 is used as the DTI clock supply route two.
OFF DIU 2 is not used.
4ON DIU 3 is used as the DTI clock supply route three.
OFF DIU 3 is not used.
5ON×1.5 M clock for DIU 0
OFF 2 M clock for DIU 0
6ON×1.5 M clock for...

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PH-CK16
Phase Lock Oscillator
SWITCH 
NAMESWITCH
NO.SETTINGSTANDARD 
SETTINGMEANING
SWAB1
2
3
4ON Not used
OFF×Not used
5
MUSIC CH1 selection. The kind of music varies depending on the melody IC located on this 
circuit card. 6
7
8ON Not used
OFF×Not used
SWA0-1 SWA0-2 SWA0-3 MUSIC
OFF OFF OFF Für Elise
ON OFF OFF Maiden’s prayer
Not usedOFF ON Buzzer
Not usedON OFF Chime 

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PH-CK16
Phase Lock Oscillator
6. External Interface
When this circuit card is located in the TSWM, connect 34PH EXCLK CA-A to the EXCLK0/EXCLK1
connectors on the backplane of the TSWM.
Figure 3-8   LT Connector Lead Location of PLO (TSWM)
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23Slot No.
TSWM
FRONT VIEW
PLO #1
PLO #0
26 1
FM 1 27 2
FM 0 28 3
SYN 1BE
29 4
SYN 0BE
30 5
DIU 3BSYN 1A
31 6
DIU 2BSYN 0A
32 7
DIU 1BDIU 3A
33 8
DIU 0BDIU...

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PH-CK16
Phase Lock Oscillator
Figure 3-9   Connecting Route Diagram
DCSB1
DIU0A1
DIU0B1
DIU1A1
DIU1B1
DIU2A1
DIU2B1
DIU3A1
DIU3B1 DCSA1
DCSB0
DIU0A0
DIU0B0
DIU1A0
DIU1B0
DIU2A0
DIU2B0
DIU3A0
DIU3B0 DCSA0
POUT B POUT A
POUT B
POUT A
POUT B
POUT A
POUT B
POUT A
CCT /DTI
/PRT
CCT /DTI
/PRT
CCT /DTI
/PRT
CCT /DTI
/PRT
PLO #0
PLO #1
DCS
Note :
The following circuit cards have Clock Output Leads for a PLO card:  CCT (PA-24CCTA, PA-30CCTB),
DTI (PA-24DTR, PA-30DTS),...

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PH-CK16
Phase Lock Oscillator
7. Switch Setting Sheet
SWITCH NAME SWITCH SHAPE REMARKS
MB
SW01
SW02
SW03
SWAC
SW8F
SWAB
ON
1234ON5678
1234ON5678
12ON
1234ON
1234ON5678