GDK-100
DIGITAL KEY TELEPHONE SYSTEM
74
DSIB can be installed in any of slot No. 1-12.
The maximum extension boards except Wireless Terminals are limited by 72 extensions in a
system.
Add-on boards: DTRU, MSGU
3.4.4.6 DTRU/DTRUII Installation
A DTRU contains 2 DTMF receiver circuits and a DTRU II has 4 DTMF receiver circuits. Each receiver of
DTRU /DTRU II is time-shared under the control of the system software, as a system resource regardless
its position.
The position of Installation
The quantity of receivers
Marking on PCB
DTRU
SLIB24, SLIB48, DSIB, LCOB,
AC15, BWDIDB, EMIB, DIDB
2 DTMF receivers
DTRU of GDK-34/36
DTRU II
SLIB II
4 DTMF receivers
GDK-100 DTRU II
The System is capable of supporting DTMF receivers up to 22.
At least a DTRU or DTRU II should be installed to receive DTMF signals.
Take a cautious attitude in installing DTRU on the boards because DTRU contains the connectors
without the connection guide, otherwise DTRU may be damaged by wrong connection.
CN5
Figure 3.4.4.5
MSGU and DTRU Installation
MSGU
DT
RU