AudioCodes 405HD, Administrator'S Manual, Page: 40 / 242

400HD Series IP Phones
Administrator's Manual 40 Document #: LTRT-11973
Figure 3-15: Server Options
14. Click Apply and then follow the same procedure to add the other user classes. After
adding them, click the OK button.
You've successfully created Scope Options that will only allow AudioCodes phones to
connect to the Device Manager when they boot up and will prevent other vendor phones
from receiving the Device Manager as their provisioning server.
Figure 3-16: Scope Options Created
3.1.2.7
SIP SUBSCRIBE and NOTIFY Messages
If the provisioning information (e.g. Option fields 66/67/160) is not provided by the DHCP
server, the phone sends a SIP SUBSCRIBE message to the multicast address
224.0.1.75:5060 as shown below.