Reject Incoming Calls with Invalid Numbers
For security reasons, you may want to block incoming call to your Codec Unit coming from SIP or
H323 attackers on the network, especially if the codec unit is reachable from a public network.
To disable SIP or H323 incoming calls from sources using invalid numbers browse to
[GUI]> CONFIGURE > ADVANCED > PROTOCOLS > GENERAL: REJECT SIP/H323 INVALID NUMBER CALLS.
[WEB]> ADMINISTRATOR SETTINGS > ADVANCED > PROTOCOLS>GENERAL: REJECT SIP/H323 INVALID NUMBER CALLS.
You can disable this feature for each network interface.
• Important:
• Once this feature is enabled, incoming calls are affected in this way:
o If the device is not registered to any SIP server, SIP incoming calls by IP
address will be rejected. You need to place calls to this device using the
user@host syntax or host##user, where host is the CU IP address and user
must be the SIP username.
o If the device is not registered to any Gatekeeper, H323 incoming calls by IP
address will be rejected. You need to place calls to this device using the
alias@host syntax or host##alias, where host is the CU IP address and alias
is the H323 Alias.
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