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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
The SLIB24/SLIB48 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 (for SLIB24), MSGU48 (for SLIB48)
2.4.9.4
SLIB II (Single Line Interface Board with 12 ports)
SLIB II provides the capability to connect 12 single line analogue devices to the system with appropriate
A/D and D/A conversions. SLIB II is -28 VDC Battery feed. The SLIB II allows the SLT access to CO
Lines connected to the system, other stations, and most features of the system through the use of dial
codes. Connections to the SLIB II are made through RJ21 type female connector.
The SLIB II is equipped with a Message Wait source, optional MSGU II, which activate a lamp in the
SLT, if so equipped. The Message Wait source sends 90 VDC signal to the SLT illuminating the MW lamp.
A Ring Generator Unit is required in cabinet where a SLIB II is installed.
The SLIB II allows a Single Line Telephone to be connected up to 2.5 Kilometers (8,200 feet, loop
resistance: 490 ohm) from the system using 22 AWG wire. See the Table 2.4.3.
In addition, an LED is mounted on the PCB to indicate the status of ports connected to SLIB II. It will turn
on when one or more ports are busy.
SLIB II 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 II, MSGU II
2.4.9.5
DSIB (DKTU/SLT Interface Board with 12 ports)
DSIB provides 6 SLT and 6 DKT interfaces. Connections to the DSIB are made through RJ21 type
female connector. An LED is mounted on the PCB to indicate the status of ports connected to SLIB. It will
turn on when one or more ports are busy.
6 DKT interface circuits on this board have the same characteristics that those on DTIB12/24 do. See
the part of DTIB12/DTIB24 in this section.
6 SLT interface circuits on this board also have the same characteristics that those on SLIB24 do as
followings. DSIB is 24 VDC Battery feed. The DSIB is equipped with a Message Wait source, optional
MSGU, which activate a lamp in the SLT, if so equipped. The Message Wait source sends 90 VDC signal
to the SLT illuminating the MW lamp. A Ring Generator Unit is required in cabinet where a DSIB is
installed.
The DSIB allows a Single Line Telephone to be connected up to 2.5 Kilometers (8,200 feet, loop
resistance: 490 ohm) from the system using 22 AWG wire. See the Table 2.4.3. The DSIB also allows a
DKTU to be connected up to 0.5 Kilometers (1600 feet) from the system using 22 AWG wire.
The 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
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