Network Interfaces; Basic Rate Interface Bri-T - Mitel SMB Controller System Manual

C 4
HAPTER

Network interfaces

Equipping the system with interface cards provides the necessary network interfaces. With the exception
of the Ethernet interface, which also represents a network interface via SIP access, there are no network
interfaces on the Mitel SMBC mainboard.

Basic rate interface BRI-T

With the appropriate interface cards and wiring adapters, BRI network interfaces can be made available
at RJ45 sockets 1.x...4.x.The possible RJ45 sockets are highlighted in colour in the figure below.
:
NOTE
• The interfaces can be configured on BRI-S using the wiring adapters (see
• Circuit type as per EN/IEC 60950: SELV
The connection from the front panel to the NT1 (Network Termination) is via standard commercial straight
patch cables with 8-pin RJ45 connectors on both sides. With the appropriate tools you can also create
your own cables.
Cable Requirements
Table 4.7:Cable requirements for basic rate interface BRI-T
Core pairs X cores
Stranded
Wire diameter, core
Screening
Characteristic impedance
Wave attenuation
Near/crosstalk attenuation
Figure 4.19: Connection possibilities for BRI network interfaces
1 X 4 o 2 X 2
yes
0.4...0.6 mm
recommended
lt; 125 W (100 kHz), lt; 115 W (1 MHz)
lt; 6 dB/km (100 kHz), lt; 26 dB/km (1 MHz)
> 54 dB/100 m (1 kHz to 1 MHz)
C
ABLING INTERFACES
I
NSTALLATION
Fitting a wiring adapter).
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