Chapter 4 – Trunk Installation
75
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:
One VS-ICOTB card is required for one ISDN BRI (2B+D) subscriber trunk.
One Customer Provided External NT1 device is required to interface one ISDN BRI trunk (2B+D)
to the VS-ICOTB card.
The table below lists the switch types and protocols supported by the VS-ICOTB card:
Switch Type
Protocol Type
Detail Type
DMS-100
National ISDN
DMS-100(Custom)
Multipoint2
5EES
National ISDN
Multipoint2
The ADIX-VS must be installed within the United States and Canada. ADIX-VS does not support
European ISDN BRI.
CN1
CN SG
BRI
No. 1, 2, 3
CN4
VS-ICOTB
NT-1
Terminal
S/T
Network
U
8-wire Modular Cord
CO Termination
RJ-48C
8-wire Modular Cord
2
4
6
8
1
3
5
7
RED BLK
GRN YEL
RECEIVE PAIR
TRANSMIT PAIR
8-wire Modular Cord
from VS-2ICOTB
S/T Connection
from NT-1
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.
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