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GDK-100
DIGITAL KEY TELEPHONE SYSTEM
2.4.14 Cables (5MC1, 5MC2)
There are two kinds of line connection cables, one (5MC1: 6851NF0023A) is for the connection to
analog CO lines or PFTU, and the other (5MC2: 6851NF0028A) is for the connection to the terminals or
miscellaneous devices. 5MC1 consists of the 25-pair cable with 5 meter line length and a RJ21 type
female connector, and 5MC2 consists of the 25-pair cable with 5 meter line length and a RJ21 type male
connector. One end of the cable is connected to a RJ21 type connector, and the other is open.
So the RJ21 type connector of the cable can be connected to another RJ21 type connector on the
function boards according to the type of connector described above. And open wires of the cable can be
connected to a user connection point, e.g. the MDF which a supplier provides.
MDF, which is in wide use in the countries, can be locally used according to the requirements of
local regulation.
If necessary, above cables can be supplied from a supplier on the order.
2.4.15 BRI Line Terminating Board (GDK-162/100 TERM: 2923NP1656A)
GDK-162/100 TERM unit provides four pairs of 100 ohm terminating resistors. The unit is capable of
accommodating 4 BRA lines with RJ45 type jacks. It has metal case.
This can be connected at outside of the system. If a customer use Basic Rate (S or T) interface but the
100 ohm terminating resistors are not introduced on the interface circuit, this board will be useful.
See the parts of BRIB Installation, STIB Installation, and Terminating Resistors on Basic Rate Interfaces
in section 3.
2.4.16 Trace Tool (GDK-TRC1)
GDK-TRC1, Figure 2.4.7, provides a RS-232 Serial Interface for the maintenance of special cards of
GDK-100 system. It provides 4-wire interface to connect to GDK-100 boards and RS-232 interface to
connect to the serial port of PC. All two cables are offered in the GDK-TRC1 package.
GDK-TRC1 can be connected to the following board for access..
System Name
Board Name
GDK-100
PRIB issue 2B or later, all BRIB, STIB, WTIB, DVIB, E1IB version
Caution: This tool should be only used by LG Information & Communications, Ltd. and its agent
for the purpose of the maintenance of GDK-100 system, but not by an end user.
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