Aastra OpenCom 131 User Guide - Page 127
Aastra 673xi/675xi Hot Desking, Devices, Status, Network, Telephony, VoIP Phone
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Voice over IP (VoIP) SIP Telephony Devices selection to the "All" setting or to the "with configured MAC only" setting. ■ By using the "Easy Configuration / Hot-Desking" feature you can add a device entry without entering a MAC address and without entering an IP address. An unregistered Aastra 673xi/675xi will show a login page after startup. A user can enter the desired call number and the matching user PIN which will establish the association of the user account to the device entry. For this, change the Status setting on the Network: DHCP page to "Dynamic address assignment" and also change the Devices selection to the "All" setting or to the "with configured MAC only and all SIP system devices" setting. If you want to use both features concurrently, change the Status setting on the Network: DHCP page to "Dynamic and static address assignment". If you operate another DHCP server in your network, the Aastra 673xi/675xi can distinguish the different DHCP answers and will normally take its configuration data from the OpenCom 100 communications system nevertheless. In a conflict situation, you may need to prevent the configuration of the Aastra 673xi/675xi SIP phone by a foreign DHCP server. For example, add an exception rule for all MAC addresses starting with 00:08:5D. The TFTP server of the OpenCom 100 communications system will serve up to 4 concurrent data transfers. To avoid overloading the TFTP server (e.g. after a power failure), additional devices may get an IP address from the DHCP server with a delay. The allocation of IP addresses will restart if the TFTP server indicates the end of the overload situation. 9.4.3.3 Aastra 673xi/675xi Hot Desking The Aastra 673xi/675xi SIP phones support the "Easy Configuration / Hot desking" feature. This feature allows a user to operate his personal configuration on any desired Aastra 673xi/675xi of equal type. To prepare a Aastra 673xi/675xi for Hot Desking, you can configure a function key with the "Logout" function. If this function key is pressed, the currently assigned device entry will be marked as "Logged Out" and the Aastra 673xi/675xi restarts. You can indicate logged out device entries in the Configurator on the Telephony: Devices: VoIP Phone page by their shortened MAC address. 125