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Operational, Basic, and Advanced Parameters
41-001343-02 REV04 – 05.2014 A-12
DHCP Option Settings
Option 12
Option 77
Option 120
Parameter–
hostname
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Specifies the hostname DHCP Option 12 that the phone sends with the DHCP Request
packet.
Note:
If you change this parameter, you must restart your phone for the change to take affect.
Format String
Default Value [<model><MAC IP Address>]
Range Up to 64 alpha-numeric characters
Note:
The value for this parameter can also be a fully qualified domain name.
Example hostname: aastra4
Parameter–
dhcp userclass
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Specifies the User Class DHCP Option 77 that the phone sends to the configuration server
with the DHCP Request packet.
Note:
If you specify a value for this parameter, you must restart your phone for the change to take
affect. Any change in its value during start-up results in an automatic reboot.
Format String
Default Value ““
Range Up to 64 alpha-numeric characters
Example dhcp userclass: admin
Parameter –
use dhcp option 120
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description Enables support for DHCP Option 120 on the IP phones. DHCP Option 120 allows SIP clients
to locate a local SIP server (i.e. outbound proxy server) that can be used for all outbound SIP
requests.
Format Boolean
Default Value 0 (disabled)
Range 0-1
0 (disabled)
1 (enabled)
Example use dhcp option 120: 1