PLANET ICF-1700 - Manual (Page 91)

Ban anonymous call Configure whether to banned anonymous call.
Enable strict proxy Compatible with special server, using source address of
opposite side when return message, no longer using
address in the via field.
Enable subscribe After successful registration, subscription information,
you can subscribe to the state of someone else or voice
mail, etc.
Enable via rport Configuration can support RFC3581, rport mechanism is
used for internal the network, and requires a SIP server
support, used to maintain internal and external network
device NAT connection
Enable prack Configure whether to support SIP-PRACK function
(mainly ring tones will be used) recommends using the
default configuration
Enable uri convert Convert # to %23 when send URI
Enable DNS SRV Configure whether to support RFC2782 protocol edition.
Enable display name
quote For compatibility with server configuration issue
signaling display name in quotes to expand up
Use stun Enable/Disable SIP STUN；
Stun Server Configure the SIP STUN server address.
Stun port Configure the SIP STUN server port.
Backup server Configure a backup server address. When the primary
server is not connected, the user can make calls using
the backup server communication (only when the
primary server cannot connect, the backup server before
connection); When the primary server connection, the
phone will automatically switch back to the primary
server.
Backup server port Configure the SIP backup server port.
Voice coding settings parameters:
Item Description
First codec Set the first priority using voice coding during a voice
call.
Second codec Set the second priority using voice coding during a voice
call.
Third codec Set the third priority using voice coding during a voice
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