Installation and first-time operation 
120 Aastra 5370/Aastra 5370ip
eud-1281/1.3 – R3.0 – 04.2013
Connect Aastra 5370
Connections
Connecting your phone to the system
• Plug the connector on the phone cord on the underside of the phone into the 
socket with the phone symbol.
• Desk installation only: To relieve the strain on the cable feed the cable through one 
of the cable guides on the stand rest.
• Plug the other end of the cable into the phone socket outlet.
• Set channel selector switch on the underside of the phone. Contact your system 
administrator for more information.
Logging your phone on
Your system administrator has to prepare the system before you can log on your 
phone.
Telephone connection
Connecting the handset
Headset connection
Connecting the Aastra M530/Aastra M535 expansion key module or power 
supply