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Chapter
4
4.2.6 Connection to the Public Network
4.2.6.1 Digital Public Network via T0 Access (or DLT0 Private Network)
The OXO Connect system can be installed near the digital network termination or at a certain distance
(up to 350 m), as required.
4.2.6.1.1 Connection without T0/S0 Forwarding
Caution:
In T0 Point-to-Point installations, the OXO Connect system MUST BE the terminating element of the bus
and any other terminating resistor MUST BE removed.
4.2.6.2 Digital Public Network by T1 or T2 Access
The diagram below shows a PRA-T2 board, but is equally applicable for a PRA-T1 board.
DLT
The PRA board is connected to a digital line termination (DLT) by 2 symmetrical twisted pairs.
Cable impedance: 120 Ohms +/- 20% between 200kHz and 1MHz; 120 Ohms +/- 10% at 1 MHz.
8AL91217USAA - Ed. 01 - July 2018 - Installation Manual
Powering and connecting the PBX to the customer LAN
ZA
ZA (4)
2
1
or
3
4
5
6
ZB
ZB (5)
Distribution panel
Transmission
DNT
Reception
Distribution panel
Transmission
TX
RX
Reception
Distribution panel
ISDN ACCESS - T0
1
2
3
4
TX
RX
ISDN ACCESS - E1
NETW
ANALOG INTERFACES
SLI16-2
9
10
11
12
13
14
1
2
3
4
5
6
BRA8-2
5
6
7
8
PRA-T2
BUSY RAI
AIS
NOS CRC LOS
PBX
15
16
7
8
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