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Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
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Chapter 5 Configuring Network Settings on the Cisco IP Phone
Configuring IP Settings
Assigning Subnet Mask
The subnet mask is used to partition the IP address into a network and a host
identifier. The subnet mask is used to mask a portion of the IP address so that
TCP/IP can distinguish the network ID from the host ID.
Cisco IP Phone 7960/7940
Procedure
Step 1 Press settings.
Step 2 Use the Navigation button to select Network Configuration.
Step 3 Press the Select soft key.
Step 4 Scroll to Subnet Mask.
Step 5 Press the Edit soft key.
Step 6 Use the buttons on the dial pad to enter the new subnet mask, using the * key on
the dial pad or the . soft key to enter periods.
Step 7 Use the << soft key to correct any mistakes.
Step 8 Press the Validate soft key.
Step 9 Press the Save soft key to save this change.
Cisco IP Phone 7910
Procedure
Step 1 Press settings.
Step 2 Press 6 (Network Configuration).
Step 3 Use the down volume key to select Subnet Mask.
Step 4 Press * to edit.