Grandstream Networks HT818 Administration Manual page 22

Disable Direct IP Call
Play Busy Tone When Account is
unregistered
Blacklist for Incoming Calls
NTP Server
Allow DHCP Option 42 to override
NTP server
DHCP Option 17 Enterprise
Number
CDR File Option
SIP File Option
Disable Weak TLS Cipher Suites
Minimum TLS Version
Maximum TLS Version
Syslog Protocol
Direct IP call is disabled if set to Yes.
When this feature is set to Yes, device will play busy tone when the FXS port account is not
registered, and the attached analog phone is offhook.
Allow users to block incoming calls from specific list of numbers.
Maximum allow 10 SIP numbers and each number should be separated by a comma (',') in web
UI.
Other allowed characters are 0-9, comma (","), asterisk ('*'), pound sign ('#') and plus sign ('+').
Defines the URL or IP address of the NTP server. The ATA may obtain the date and time from the
server. The default setting is "pool.ntp.org."
Defines whether DHCP Option 42 should override NTP server or not. When enabled, DHCP Option
42 will override the NTP server if it is set up on the LAN. The default setting is Yes.
Configure the DHCP option 17 number. Default is 3561
By default, the device will split the allowed memory for CDR file into 2 parts. Device will create
the first CDR file which is half of the allowed size, when it is full, device will create the second
file.
When "CDR File Option" is set to Default "Keep", device will keep the call records when both files
are full, no more new record will be stored.
When this feature is set to "Overwrite", device will clear the first CDR file and start storing again.
The CDR file output will be available at Status page: [CDR File]
By default, the device will split the allowed memory for SIP file into 2 parts. Device will create the
first SIP file which is half of the allowed size, when it is full, device will create the second file.
When "SIP File Option" is set to Default "Keep", device will keep the call records when both files
are full, no more new record will be stored.
When this feature is set to "Overwrite", device will clear the first SIP file and start storing again.
The SIP file output will be available at Status page: [SIP File]
Note: "Send SIP Log" must be enabled to be able to capture the trace.
Allows users to disable weak ciphers DES/3DES and RC4, Symmetric Encryption SEED,
Symmetric Authentication MD5, Protocol Version SSLv2/SSLv3 or Disable All of the Above Weak
TLS Ciphers Suites.
Default is No.
This feature allows customer to choose desired Minimum TLS Version.
Choices are:
Unlimited
TLS 1.0
TLS 1.1
TLS 1.2
Default is Unlimited.
This feature allows customer to choose desired Maximum TLS Version.
Choices are:
Unlimited
TLS 1.0
TLS 1.1
TLS 1.2
Default is Unlimited.
If set to SSL/TLS, the syslog messages will be sent through secured TLS
Protocol to syslog server.
Default setting is UDP.