Aastra 5370 User Manual page 124

Installation and first-time operation
Connecting the Aastra M530/Aastra M535 expansion key module
Note:
Always disconnect the phone from the mains power first before you connect/dis-
connect an Aastra M530/Aastra M535 expansion key module.
• Unplug the phone cord from the socket on the underside of the phone.
• Attach Aastra M530/Aastra M535 expansion key module to the right of the phone
until you feel and hear it snap into place, as indicated in the following figure.
• Plug the cord into the supplementary equipment sockets on the underside of the
phone and the Aastra M530/Aastra M535 expansion key module.
• Feed the connecting cable through the strain relief on the underside of the
Aastra M530/Aastra M535 expansion key module.
• Plug the phone cord back into the socket on the underside of the phone. The
expansion key module Aastra M530/Aastra M535 is now ready for operation.
• Depending on the type of power supply, you may need an additional power supply
unit for your expansion key module. If there is an under supply of power, a message
appears on the display. Contact your system administrator for more information.
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Aastra 5370/Aastra 5370ip
eud-1281/1.3 – R3.0 – 04.2013