GDK-100
DIGITAL KEY TELEPHONE SYSTEM
20
2.4.9.2
ETIB (Electronic Terminal Interface Board)
ETIB allows the LG proprietary electronic terminals to be connected. There are GK /GSX EKTU series,
GSX DSS and KD-ICM box as electronic terminals. ETIB provides 4-wire interfaces for terminal
connection; 2-wire for voice communication and 2-wire for signaling data. The board provides for 12
interface circuits, incorporates circuits for A/D and D/A conversion of voice signals, and interprets and
sends signaling data to/from EKTU.
ETIB has an industry standard RJ21 type female connector mounted on the front edge for connection to
the station MDF.
In addition, an LED is mounted on the PCB to indicate the status of the connected terminals. It will turn
on when one or more ports are busy.
The ETIB 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.
2.4.9.3
SLIB24/SLIB48 (Single Line Interface Board with 6 ports)
SLIB allows single line analog devices to be connected.
Four kinds of SLIB boards are available in GDK-100 system;
Board Name
Interface circuit
Feed voltage
Remark
SLIB24
6 cct
24VDC battery feed
SLIB48
6 cct
-48VDC battery feed
SLIBII
12 cct
-28VDC battery feed
See 2.4.9.4
DSIB
6 cct
24 VDC battery feed
See 2.4.9.5
!
Note
1. DSIB provides 6 digital terminal interfaces and 6 single line analogue interfaces.
For SLIB II and DSIB, see the parts of SLIBII and DSIB in this section.
SLIB24/SLIB48 are capable of accommodating up to 6 single line analog devices. The boards are
configured with hybrid circuit and COMBO; converts A/D and D/A signal. SLIB24/SLIB48 allow 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 are made through RJ21 type female connector.
The SLIB24/SLIB48 can be equipped with a Message Wait source (optional MSGU for SLIB24 or
MSGU48 for SLIB48), 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 the cabinet
where a SLIB is installed. An optional DTMF receiver unit (DTRU) can be installed on the SLIB24/SLIB48.
The SLIB24 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. The SLIB48 allows a SLT to be connected up
to 5 Kilometers (16,500 feet, loop resistance: 790 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. It will turn
on when one or more ports are busy.
Содержание GDK-100
Страница 2: ...GDK 100 DIGITAL KEY TELEPHONE SYSTEM ii Blank sheet ...
Страница 52: ...GDK 100 DIGITAL KEY TELEPHONE SYSTEM 43 LKD 2NS LKD 8DS LKD 30DS LKD 30LD Figure 2 4 3 LKD Digital Keysets ...
Страница 53: ...GDK 100 DIGITAL KEY TELEPHONE SYSTEM 44 GSX 8BTN Figure 2 4 4 GSX Electronic Keysets GSX 33 EXE ...
