For your phone to work, it must be connected to the corporate IP telephony network. Your system administrator
can help you connect your phone.
Adjusting the Handset Rest
You can adjust the handset rest of a wall-mounted phone so that the receiver does not slip out of the cradle.
DC adaptor port (DC48V)
AC-to-DC power supply (optional)
AC power wall plug (optional)
Cisco Unified IP Phone 3905 User Guide for Cisco Unified Communications Manager Express Version 8.8 (SIP)
Network port (10/100 SW) connection.
IEEE 802.3af power enabled.
Access port (10/100 PC) connection