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Aria-34e
Digital Key Telephone System
4.5.17 ISDN STIB (S/T INTERFACE BOARD) INSTALLATION
The STIB provides 2 ports of BRI (Basic Rate Interface) format „S‟ and „T‟ mode interface. This
board is developed to the I-CTR3[4] European Technical Standards for Basic Rate Access. The
operating mode selection is performed by setting the shorting pins and DIP switches to the
required position. When operating in „S‟, this is used for connecting to an ISDN terminal and the
„T‟ mode is used for connect the ISDN CO line. The mode selection method is shown in the
following table. When using this board, the PLLU2 board must be installed on the MBU. If
more than two ISDN boards are installed, special cable should be used for clock signal control
between multiple boards. Refer to [Clock Control Cable Wiring] section.
Note: The STIB board should be installed in slot #4~7 and DIP switch #2 of SW1 must be ON.
LINE
Connector & Switch
LINE1
CONN1, CONN3
SW2
LINE2
CONN2, CONN4
SW3
Aria Communications Pty Ltd.
A.C.N. 090 723 925
Figure 15. PRI BOARD
Mode
Selection Method
move short pins to „T‟ position
move SW2 to „T‟ position
T
move short pins to „S‟ position
S
move SW2 to „S‟ position
move short pins to „T‟ position
move SW2 to „T‟ position
T
move short pins to „S‟ position
S
move SW2 to „S‟ position
4-21
Installation
Rev 1.3
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