User's Manual

If HTTP_RETRY_NUMBER is not specified in the Device Configuration file, the default
number of attempts is applied.
If HTTP_RETRY_NUMBER is set to 0 in the Device Configuration file, the IP Deskphone
performs HTTP retries continuously until it receives a response other than HTTP 503. If
the HTTP_RETRY_NUMBER is configured as a negative value, the default number of
attempts is applied.
• DHCP_NUMBER_OF_RETRIES [x] — This parameter configures the number of times
the IP Deskphone attempts to contact the DHCP server.
The default value is 4.
- minimum value is 1
- maximum value is 10
If the value defined in the System Configuration file is incorrect, the default value is
used.
• DHCP_INITIAL_TIMEOUT [x] — This parameter configures the initial time interval
between attempts by the IP Deskphone to contact the DHCP server.
The default value is 4 seconds.
If the DHCP server does not respond, the IP Deskphone sends several requests one after
another in different timeout intervals, based on the formula
timeout[i]=2* timeout[i-1] +- 1second
where “i” is the number of retries and timeout[0]= DHCP_INITIAL_TIMEOUT. The
maximum timeout between Discovery requests cannot be greater than 64 seconds. If the
value of the next timeout becomes greater than 64 seconds, the DHCP client stops
increasing the timeout interval and keeps the timeout value of 64 seconds.
- minimum value is 4 seconds
- maximum value – 10 seconds
If the value defined in the System Configuration file is incorrect, the default value is
used.
• DHCP_UNTAG_ENABLED [YES | NO] — When this parameter is enabled, the IP
Deskphone attempts to obtain an IP address in a VLAN (DHCP discovery frames are
tagged), and the DHCP server is unreachable, then after the pre-defined number of
Discovery attempts the IP Deskphone begins sending Discovery frames in non-VLAN
mode. If the IP Deskphone still does not receive an Offer then, after a pre-defined number
of Discovery attempts, the IP Deskphone reverts to VLAN tag mode again.
The default is NO.
• SRTP_ENABLED [YES | NO] — This parameter configures SFTP configuration values.
The default value is NO.
- YES – enables SRTP.
Configure the provisioning server
54 SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013
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