Isdn Boards; Isdn Prib (Primary Rate Interface Board); Isdn Brib (Basic Rate Interface Board: T Interface Only) - LG GDK-100 Manual

GDK-100
DIGITAL KEY TELEPHONE SYSTEM

2.4.11 ISDN Boards

GDK-100 ISDN Boards are capable of supporting various types of ISDN as followings,
Board Function
PRIB Provides ISDN Primary Rate interfaces,
1 interface /30 B channels
BRIB Provides ISDN Basic Rate interfaces(T),
4 interfaces /8 B channels
STIB Provides ISDN Basic Rate interfaces(T/S switchable),
4 interfaces /8 B channels
E1IB Provides Digital Trunk(E1) interfaces,
1 interface /30 B channels

2.4.11.1 ISDN PRIB (Primary Rate Interface Board)

PRIB (Primary Rate Interface Board) has capable of connecting to 1 PRI line, which has an interface
circuit for 30 time slots with 2.048Mbps data rate speed. PRIB will be positioned at reference point Ia on
ETS 300 001, that is TE slave without power feeding. And, Data & bit clock are transmitted by the NT
master and extracted by TE salve.
PRIB contains reset and watchdog circuit, address decoder, external RAM, program memory (ROM), the
circuitry to control PLL device and DBID, and the board line's specific circuitry. The line interface circuit
consists of LXT304A which provides receive jitter attenuation, MT8979 which provides a complete
interface between a 2.048Mbps primary rate and MITEL's Serial Telecomm Bus (ST-BUS), and MT8920
which is provides a simple interface between ST-BUS and parallel system environments.
PRIB should be installed in any of slot No. 1-7.
A PLLU MUST be installed for proper operation.
One PRIB can be installed in a system.
QSIG function can be supported through PRIB (software version 99A), and SMEMU MUST be
used for this function.

2.4.11.2 ISDN BRIB (Basic Rate Interface Board: T interface only)

BRIB has specified to support four interface circuits that allow interfacing the ISDN BRI. Four interface
circuits are used for the transmission of digital signals. Data & clock are transmitted by the NT master and
extracted by TE salve. GDK-100 BRIB will be positioned at reference point Ia (T) on ETS 300 012, that is
TE slave without power feeding.
BRIB contains reset and watchdog circuit, address decoder, external RAM, program memory(ROM), the
circuitry to control the highway interface(DBID), and the board line's specific circuitry. The board line's
specific circuitry is PEB2084 for Physical layer and PEB2075 for data link layer.
BRIB should be installed in any of slot No. 1-7.
A PLLU MUST be installed for proper operation.
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connection
4 wire
4 wire
4 wire
4 wire