5.5.3 FXS1/2/3/4/5/6/7/8 Supplementary Service Subscription
Select to enable or disable
Fill in the hotline number. After the
subscriber is set up successfully, the
hotline number will be automatically
dialed immediately after off-hook
Enable WMI (Message Waiting
Indication), enable this function if you
want to use voicemail
Fill in the voicemail code provided by
your ISP
Select to enable or disable
Select to enable or disable
After enabling this option, any phone call
can not be dialed in, default is disable.
Pre-set the phone number for Fast call