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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
!
Note
1. Access to the board for the purpose of development and maintenance.
The external module for RS 232C serial interface should be required for trace using this connector.
See GDK-TRC1 in section 2.
2. CON3, CON4: BNC type 75 ohm connectors for E1 line connection.
These connectors are usually not assembled except for special countries.
3. CON5, CON6: They are used to control the clock signal when multi-ISDN boards are installed.
See [Clock Control Cable Wiring] in section 3.5.
Check Points
1. One E1 board should be installed on one of the slot No. 1-7 except slot No.8 and EKSU.
2. PLLU or PLLU2(issue 3 or later) MUST be installed on MPB.
3. Check the contact assignments of RJ45 or BNC.
LED7
LED1
LED2
LED3
LED4
LED5
LED6
CON7(OUT)
CON6(IN)
CON1
CON4
RJ45
CON2
CON3
Figure 3.4.6.4
E1IB Layout and CPTU installation
CPTU
CPTU
CPTU
U2
90
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