Mitel Aastra 470 System Manual page 126

Installation
ports in groups of 4 ports. If the temperature then drops, the FXO ports
are automatically reactivated group by group. This behaviour can
occur particularly when the ambient temperature is higher than nor-
mal and/or with a system with maximum configuration. Normally local
exchanges produce a loop current of approx. 25 mA, which does not
cause any restrictions.
– Circuit type as per EN/IEC 60950: TNV-3
Connection
Assignment of the RJ45 sockets on the front panel:
Tab. 54 Connection FXO network interface
Public analogue network
a
b
126
Communication server
FXO signal Pin
– 1
– 2
– 3
a 4
b 5
– 6
– 7
– 8
Socket
Aastra 470 as of R3.2
syd-0337/1.6 – R3.2 – 09.2014