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Addendum to SIP 3.1 Administrator’s 
Guide
This addendum addresses changes to the SoundPoint IP / SoundStation IP 
SIP 3.1 Administrator’s Guide specific to the release of the SoundPoint IP 450 
desktop phone.
The SoundPoint IP 450 desktop phone hardware behaves in a similar manner 
to the SoundPoint IP 430 except for:
• The SoundPoint IP 450 phone has a 4-bit grayscale or monochrome LCD 
display. It has a resolution of 256 by 116 pixels.
• The SoundPoint IP 450 phone has an additional line key.
• The SoundPoint IP 450 phone has an HD handset like the SoundPoint IP 
550, 560, 650, and 670.
The new or changed features include:
Configuration file changes are described in 
.
The default SIP key layout for the SoundPoint IP 450 desktop phone is shown 
in 
 on page 
.
For more information, refer to the Release Notes for the SIP Application, 
Version 3.1.1.