Polycom IP 320 Administrator's Manual page 61

6. Remove any <MACaddress>.cfg files that may have been used with
earlier releases from the provisioning server.
This approach takes advantage of an enhancement that was added in
Note
SIP2.0.1/BootROM 3.2.1 that allows for the substitution of the phone specific
[MACADDRESS] inside configuration files. This avoids the need to create unique
<MACaddress>.cfg files for each phone such that the default 000000000000.cfg
file can be used for all phones in a deployment.
If this approach is not used, then changes will need to be made to all the
<MACaddress>.cfg files for SoundPoint IP 300, 301, 500, 501, 600, and 601 and
SoundStation IP 4000 phones or all of the <MACaddress>.cfg files if it is not
explicitly known which phones are SoundPoint IP 300 and 500 phones.
For more information, refer to "Technical Bulletin 35311: Supporting
SoundPoint IP 300, 301, 500, 501, 600, and 601 and SoundStation IP 4000
Phones with SIP 2.2.0 or SIP 3.2.0 and Later Releases"at
http://www.polycom.com/usa/en/support/voice/soundpoint_ip/VoIP_T
echnical_Bulletins_pub.html .
Setting up Your System
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