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In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver,
(Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder. 

• PbF solder has a melting point that is 50

° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with tempera-

ture control and adjust it to 700

° ± 20° F, (370° ± 10°C). 

Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100

°F, (600°C).

• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the

opposite side (See figure, below).

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other 
materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.

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Control Bus

Original bus (16 bit, 8 MHz,10 megabytes per second)

Communication Bus

H.100 bus conformity (1024 time slot)

Switching

Non-blocking

Power Input

100 V AC to 130 V AC;2.8 A/200 V AC to 240 V AC;1.7 A ;50 Hz/60 Hz

External Battery

+36 V DC (+12 V DC x 3, recommended maximum capacity is 28 Ah)

Maximum Power Failure Tolerance

300 ms (without using backup batteries)

Memory Backup Duration

 7 years

Dialling  

Trunk

Dial Pulse (DP) 10 pps, 20 pps
Tone (DTMF) Dialling

Extension 

Dial Pulse (DP) 10 pps, 20 pps
Tone (DTMF) Dialling

Mode Conversion 

DP-DTMF, DTMF-DP

Ring Frequency 

20 Hz/25 Hz (selectable)

Trunk Loop Limit 

1600 

Ω maximum

Operating
Environment

Temperature

 0 

°C to 40 °C

Humidity

10%to 90% (non condensing)

Conference Call Trunk 

From 10 x 3-party conference call to 4 x 8-party conference call

Music on Hold (MOH)

2 ports (Level Control: -11 dB to +11 dB in 1 dB steps)
MOH1: External Music Source port
MOH2: Selectable Internal/External Music Source port

Paging

Internal 

Level Control: -15 dB to +6 dB in 3 dB steps

External 

2 ports (Volume Control: -15 dB to +15 dB in 1 dB steps)

Serial Interface Port

RS-232C 

1 (max 115.2 kbps)

USB

1

Extension Connection Cable

SLT 

1 pair wire (T, R)

DPT 

1-pair wire (D1, D2) or
2-pair wire (T, R, D1, D2)

PT-interfiace CS

1-pair wire (D1, D2) 

PT-interfiace CS (High-density)

4-pair wire (D1, D2)

DSS Consoles and Add-on Key Module

1-pair wire (D1, D2)

Dimension

334 mm (W) x 390 mm (H) x 270 mm (D)

Weight (when fully mounted)

Under 12 kg 

Terminal Equipment Loop Limit

• PT: KX-DT300/KX-T7600series DPT : 90 

Ω

• SLT: 600 

Ω including set

• Doorphone: 20 

Ω

• CS: 130 

Ω ; PT-interface CS : 65 Ω

Minimum Leakage Resistance

15 000 

Ω maximum

Maximum Number of Extension
Instruments per Line

1 for PT or SLT
2 by Parallel or eXtra Device Port connection of 2 DPTs

Ring Voltage

65 Vrms at 20 Hz/25 Hz depending on the Ringing Load

Trunk Loop Limit

1600 

Ω maximum

Hookswitch Flash/Recall Timing Range

24 ms to 2032 ms

BRI Cards Internal ISDN Mode

Supply Voltage: 40 V
Power Supply (BRI4) : 4.5 W per 1 line, 9 W per 4 lines
Power Supply (BRI8) : 4.5 W per 1 line, 9 W per 8 lines
Power Supply Method: Phantom Power Supply

Door Opener Current Limit

24 V DC/30 V AC, 1 A maximum

External Relay Current Limit

24 V DC/30 V AC, 1 A maximum

External Sensor Current Limit

Power to the external sensor is provided from the EIO4 card and must be grounded through
the EIO4 card. For the connection diagram, refer to "EIO4 Card (KX-TDA0164)". The PBX
detects input from the sensor when the signal is under 100 

Ω.

Paging Terminal Impedance

600 

Ω

MOH (Music on Hold) Terminal Impedance

10 000 

Ω

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The following number of optional service cards can be installed in the various slots of the PBX.

*1 When installing T1, E1, PRI30, or PRI23 cards, make sure that the number of these cards x 2 + the number of other cards

(including IP-GW4E cards) does not exceed 8.

The following number of optional service cards can be mounted on the specified other optional service cards.

*1 Only 1 ECHO16 card can be mounted on each OPB3 card.

Card Type

Maximum Number

Installed in

DMPR

1

DMPR Card Slot

Trunk Card

Total 7*1

Free Slots 1 to 7

LCOT4

7

LCOT8
LCOT16
CLCOT8
DID8
E&M8
BRI4
BRI8
T1

4

E1
PRI23
PRI30
IP-GW4E

4

IP-GW16

Extension Card

Total 7

Free Slots 1 to 7

DLC8

7

DLC16
MCSLC16
IP-EXT16
MCSLC24

5

CSIF4

4

CSIF8

OPB3

4

CTI-LINK

1

Card Type

Maximum Number

Mounted on

RMT

1

DMPR Card

CID/PAY8

14

LCOT8 Card/LCOT16 Card

CID8
CLCOT8E

7

CLCOT8 Card

DPH4

4

OPB3 Card

DPH2

8

ECHO16

2*1

MSG4

4

ESVM2
ESVM4
EIO4

4

8

The following number of items of terminal equipment can be supported by the PBX. For how to count the total number of items
of equipment to be connected, refer to "Power Supply Unit Capacity".

*1 When the PBX is equipped with 104 DPTs (Digital XDP), 48 IP-PTs, and 24 SLTs.

Calculate the load figure from the type and number of items of equipment to be connected.

*1 Only the extension cards that can support SLTs count for the load figures.

The pre-installed power supply unit (PSU) supports the following load figures.

In addition to any combination of equipment totalling a load figure of up to 104, one additional MCSLC16 card (load figure: 16)
or one MCSLC24 card (load figure: 24) may also be added, for a total load figure of up to 128.

Terminal Equipment Type

Maximum Number

Telephone

176*1

SLT

128

KX-DT300/KX-T7600 series DPT

104

IP-PT

112

DSS console

8

CS

26

High-density CS

13

PS

128

Voice Processing System (VPS)

2

Doorphone

16

Door Opener

16

External Sensor

16

External Relay

16

Equipment Type

Load Figure

PT

KX-DT300 series DPT/KX-DT300 series DSS
console/KX-T7600 series DPT/KX-T7600 series
DSS console

1

IP-PT

0

Trunk Card

DID8

16

E&M8

8

Others

0

Extension Card*1

MCSLC16

16

MCSLC24

24

CS (1 unit)

4

PT-interface CS (1 unit)

4

PT-interface CS (High-density) (1 unit)

8

ISDN Extension

2

VPS (1 port)

1

System Equipment

Maximum Load Figures

Any Equipment

104

Any EquipmentAdditional Load Capacity for a MCSLC16/
MCSLC24 Card

24

Total

128

Equipment Type

Load Figure

KX-DT300/KX-T7600 series DPT

4 units

4

MCSLC24

4 cards

96

VPS

8 ports

8

Total

108