4. Provisioning the Phone
33
4.4.4.1 Step 1
Action. ZIP2x2 sends DHCP DISCOVER (broadcast)
Description. The ZIP2x2 boots (after power is initially applied or after receiving a SIP NOTIFY
message) and sends out a DHCP DISCOVER message requesting an IP Address and other options
(same as those provided in DHCP ACK).
4.4.4.2 Step 2
Action. DHCP Server responds with a DHCP OFFER
Description. The DHCP Server indicates an available IP Address to the ZIP2x2.
4.4.4.3 Step 3
Action. ZIP2x2 sends DHCP REQUEST (broadcast)
Description. The ZIP2x2 accepts the DHCP server’s offer and asks the server to provide its
configuration.
4.4.4.4 Step 4
Action. DHCP Server sends DHCP ACK
Description. DHCP Server responds with committed IP Address and other configuration options.
The specific options needed by the ZIP2x2 are described in section 4.2.1 on page 25.
4.4.4.5 Step 5
Action. ZIP2x2 initiates TFTP read request for ZIP2x2_common.cfg
Description. ZIP2x2 requests its common configuration file using the TFTP Server address
provided by DHCP option #66.
4.4.4.6 Step 6
Action. ZIP2x2 receives TFTP data (ZIP2x2_common.cfg) from the TFTP Server
Description. The ZIP2x2 receives the common configuration file and reads it. It is possible that the
specific configuration file for a phone is located in a directory that is not the TFTP root directory.
If this is the case, the subdirectory is indicated in this common configuration file.
4.4.4.7 Step 7
Action. ZIP2x2 initiates TFTP read request for MAC_address.cfg
Description. The ZIP2x2 requests its specific configuration file. The specific configuration file is
uniquely named with the specific MAC address of the phone (for example, 0008A10FF312.cfg).
4.4.4.8 Step 8
Action. ZIP2x2 receives TFTP data (MAC_address.cfg) from the TFTP Server
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