Installation
4.7.3.2.5 Cable Requirements
Table 54: Requirements for an S bus cable
Core pairs x cores
Stranded
Wire diameter, core
Screening
1 x 4 or 2 x 2
yes
0.4…0.6 mm
recommended
Ohmic resistance
Characteristic impedance
Wave attenuation
Near/crosstalk attenuation
lt; 98 W/km (conductor), lt; 196 W/km (loop)
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)
4.7.3.2.6 Terminals
The ETSI protocol must be set in the interface configuration.
Up to 8 terminals of different types can be connected to one S bus.
• Standard ISDN terminals
• ISDN Terminal Adapter
• PC with ISDN card
•
Group 4 fax machines
57
, etc.
Two call connections are possible simultaneously for each S bus.
4.7.3.3 FXS terminal interfaces
The 6 FXS terminal interfaces of the mainboard are permanently routed to the front panel and labelled
accordingly. The 2 remaining not labelled RJ45 sockets are empty and cannot be used. With the
appropriate interface cards and wiring adapters, additional FXS terminal interfaces can also be made
available at the RJ45 sockets 1.x...4.x. The possible RJ45 sockets are highlighted in colour in the figure
below.
Figure 47: Connection possibilities for FXS terminal interfaces
57
Not possible within an AIN
Release 7.1
139 System Manual for Mitel SMB Controller
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