User`s guide

System Administrator’s Guide – Release 7.2.3.x
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Revised: September 1, 2010
Page 86
The following sections describe some common configurations and solutions to potential problems.
14.3.1.1 Difficulty Connecting Calls
If the remote device does not register with the server or if calls to and from it cannot be connected, settings
on the firewall and the phone or port expander may have to be changed to enable communications through
the firewall. Perform the following steps:
1. Disable DHCP on the handset or port expander. For phones, this setting is on the Config / Network
Settings menu. On port expanders, the setting is found on the Config Mode page. Change the following
settings:
• DHCP
– Disabled