Primary Rate Interface Pri - Aastra 470 System Manual

Installation
4. 7. 2. 2

Primary rate interface PRI

Fitting the corresponding interface cards means that PRI network interfaces are
available on the RJ45-sockets on the front panel of the cards. The possible RJ45
sockets are highlighted in colour in the figure below.
Fig. 38 Connection possibilities for PRI network interfaces
With card 1PRI the PRI interface is routed in parallel to both RJ45 sockets for test
purposes.
Notes
– In normal operation both sockets must not be connected on the 1PRI
card; otherwise 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. 47 Cable requirements for the primary rate interface)
Core pairs  cores
Stranded
Wire diameter, core
Screening
Characteristic impedance
Wave attenuation
Near / crosstalk attenuation
124
2  2 (for short distances also 1  4)
yes
0.4...0.6 mm
yes (Cat. 5)
< 125  (100 kHz), < 115  (1 MHz)
< 6 dB/km (100 kHz), < 26 dB/km (1 MHz)
> 54 dB/100 m (1 kHz bis 1 MHz)
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013