Iwatsu ADIX-VS Technical Manual page 85

Installing ISDN BRI Trunk Trunks (VS-ICOTB)
ISDN BRI trunk trunks are terminated to the VS-ICOTB card. Each VS-ICOTB card interfaces one
ISDN BRI trunk (2B+D) to the ADIX-VS system. A maximum of three VS-ICOTB cards may be
installed in the system.
In order to support ISDN BRI trunks, the ADIX-VS system must meet the following hardware and
software requirements:
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One VS-ICOTB card is required for one ISDN BRI (2B+D) subscriber trunk.
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One Customer Provided External NT1 device is required to interface one ISDN BRI trunk (2B+D)
to the VS-ICOTB card.
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The table below lists the switch types and protocols supported by the VS-ICOTB card:
Switch Type
DMS-100
5EES
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The ADIX-VS must be installed within the United States and Canada. ADIX-VS does not support
European ISDN BRI.
FIGURE 36. ISDN BRI TRUNK CONNECTION
Note: Figure 36 illustrates the typical connection of one ISDN BRI circuit. A separate NT-1 device is
required for each ISDN BRI circuit terminated to the VS-ICOTB card. Use another VS-ICOTB card
connector for connection of a second ISDN BRI circuit. A termination resistor is required.
Protocol Type
National ISDN
DMS-100(Custom)
National ISDN
VS-ICOTB
CN1
BRI
No. 1, 2, 3
CN SG
CN4
8-wire Modular Cord
RECEIVE PAIR
S/T Connection
from NT-1
TRANSMIT PAIR
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Chapter 4 – Trunk Installation
Detail Type
Multipoint2
Multipoint2
NT-1
Terminal Network
S/T U
CO Termination
8-wire Modular Cord
RJ-48C
RED BLK
2 4 6 8
8-wire Modular Cord
from VS-2ICOTB
1 3 5 7
GRN YEL