Installation
109
Aastra 415/430 as of R3.2
syd-0344/1.6 – R3.2 – 09.2014
Fig. 35
Connection possibilities for PRI network interfaces
Notes
– In normal operation the x.2 test socket must not be connected; other-
wise faults may occur.
– Circuit type as per EN/IEC 60950: SELV
Cable Requirements
The connection to NT1 (Network Termination) is implemented using commercially
available screened cables with 8-pin RJ45 connectors at both ends, e.g. S-FTP 4P,
PVC, Cat. 5e.
Tab. 43
Cable requirements for the primary rate interface)
PRI primary rate interface, network-side
Fig. 36
PRI primary rate interface on NT1
Core pairs
cores
Stranded
Wire diameter, core
Screening
2
2 (short distances also 1
4)
yes
0.4...0.6 mm
yes
Characteristic impedance
Wave attenuation
Near/crosstalk attenuation
90 to 130
(1 MHz)
< 6 dB/km (100 kHz), < 26 dB/km (1 MHz)
> 54 dB/100 m (1 kHz to 1 MHz)
7(67
7(67
7(67
7(67
NT1
U
PRI
RXA
RXB
TXA
TXB
Exchange
Mains power
Communication
server
