Grandstream Networks GSM gateway - Manual (Page 27)

Februaray-2006 Page 27 / 42
MasterVoIP
VoIP to GSM Gateway
Send Flash Event
This parameter allows the user to control whether to send an SIP NOTIFY
message indicating the Flash event, or just to switch to the voice channel when
the user presses the Flash key.
FXS Impedance Selects the impedance of the analog telephone connected to the Phone port.
Caller ID Scheme
Select the Caller ID Scheme to suit the standard of different area.
• Bellcore (North America)
• ETSI-FSK (France, Germany, Norway, Taiwan, UK-CCA)
• ETSI-DTMF (Finland, Sweden)
• DTMF (Denmark)
Onhook Voltage Select the onhook voltage to suit different area or PBX.
Polarity Reversal
Select Polarity Reversal to adapt some call charge/billing system. Default is
No.
NTP server
This parameter defines the URI or IP address of the NTP server which the IP
phone will use to display the current date/time.
Send Anonymous
If this parameter is set to “Yes”, the “From” header in the outgoing INVITE
message will be set to anonymous, essentially blocking the Caller ID from
being displayed.
Lock keypad
update
If this parameter is set to “Yes”, the configuration update via keypad is
disabled.
Syslog Server
The IP address or URL of the System log server. This feature is especially useful
for ITSP (Internet Telephone Service Provider)