Introduction to Managing the 4602 SIP Telephone
16 4602 SIP Telephone SIP Release 1.2 Administrator’s Guide
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CAUTION:
CAUTION:
SIP uses a specific order to establish the parameters any telephone ultimately
uses. Since data can be derived from many sources, be sure to understand
which action or method of assigning/updating parameters takes precedence over
another. See the next section,
Parameter Sources and Their Precedence
for
information. Most importantly, be aware that a system or telephone restart always
sets all parameters back to their default values.
Parameter Sources and Their Precedence
The following steps show the order in which telephone settings get assigned or updated. It is
important to understand how these data sources interact to create the active configuration that
the phone finally uses.
1. The first time, and only the first time a phone starts up, default values are copied to NVRAM.
These default values are specified in
Appendix A: Configuration Parameters
.
2. Next, the telephone copies the NVRAM values for all parameters into the active
configuration.
3. The phone then runs DHCP, if it is enabled, to obtain an IP Address, Subnet Mask,
Gateway(s), DNS Server Address, and Configuration HTTP Server IP Address. These
values overwrite the current values in the active configuration.
4. The phone then downloads a configuration file and uses the values in this file to overwrite
the current values in the active configuration, unless the OverrideWeb parameter is
disabled (see
Appendix A: Configuration Parameters
).
To summarize the result of these four steps:
●
Configuration file parameters have precedence over DHCP parameters.
●
DHCP parameters have precedence over manually-configured parameters set using the
Web interface or the telephone dialpad
Setup
command.
Note:
Note:
Using the
Setup
command (from either the Web interface or dialpad) before
DHCP completes causes the saved setup values to overwrite the current values
in NVRAM.
This precedence is important to understand if you plan to use a combination of parameter
sources. It is also important to note that the dialpad
Setup
command and the Web interface
both display data from the currently active configuration and not NVRAM. However, when
values entered using either the Web interface or dialpad are saved, the displayed values
overwrite the value in NVRAM.
Thus, in the configuration process, saving a value from the Web interface or the
Setup
command takes effect only after the phone reboots and re-reads the values. Even then, DHCP
or configuration files always have precedence over manually entered or Web interface values.
Summary of Contents for IP Office 4602
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Page 12: ...About This Guide 12 4602 SIP Telephone SIP Release 1 2 Administrator s Guide ...
Page 48: ...Time Zone Determination 48 4602 SIP Telephone SIP Release 1 2 Administrator s Guide ...
