TEL URI
If the phone has an assigned PSTN telephone number, this field should be set to “user=phone”. A
“user=phone” parameter will be attached to the Request-URI and “To” header in the SIP request to
indicate the E.164 number. If set to “Enable”, “tel:” will be used instead of “sip:” in the SIP request.
Voice Mail Access Number
Allows users to access voice messages by pressing the MESSAGE button on the phone. This value is
usually the VM portal access number.
Failback Expiration (m)
Specifies the duration (in minutes) since failover to the current SIP server or Outbound Proxy before
making failback attempts to the primary SIP server or Outbound Proxy.
Network Settings
DNS Mode
This parameter controls how the Search Appliance looks up IP addresses for hostnames. If “Use
Configured IP” is selected, please fill in Primary IP, Backup IP 1 and Backup IP 2.
● A Record
● SRV
● NAPTR/SRV
● Use Configured IP
NAT Traversal
Set NAT traversal to activate the NAT penetration mechanism.
options to be chosen are No, STUN, or Keep-Alive.
● When set to "STUN" and the STUN server address is specified, detection will be based on the
STUN server.
● When set to "Keep-alive", messages can be configured to be sent at regular intervals, such as every
few minutes, and can be customized with specific packet content and timing parameters to
optimize performance in different network environments.
The Default value is set to "No".
Support rport (RFC3581)
Configures to use symmetric response routing. If it is used, the "rport" field will be added to the Via
header field in the SIP Request, and the information will be extracted from the SIP 200OK Response
for SIP Register to rewrite the SIP Contact information and apply it in subsequent SIP Requests.
Proxy-Require A SIP Extension to notify the SIP server that the phone is behind a NAT/Firewall.
Basic Settings
SIP Registration
Selects whether the phone will send SIP Register messages to the proxy/server. The default setting is
“Enabled”.
UNREGISTER on Reboot
● If set to “No”, the phone will not unregister the SIP user’s registration information before new
registration.
● If set to “All”, the SIP Contact header will use “*” to clear all SIP user’s registration information.
● If set to “Instance”, the phone only needs to clear the current SIP user’s info.
REGISTER Expiration
Specifies the frequency (in minutes) in which the phone refreshes its registration with the specified
registrar.
The maximum value is 64800 minutes (about 45 days). The default value is 60 minutes.
SUBSCRIBE Expiration
Specifies the frequency (in minutes) in which the phone refreshes its subscription with the specified
registrar.
The maximum value is 64800 minutes (about 45 days). The default value is 60 minutes.
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