Stun - Planet Networking & Communication HDP-5260PT User Manual

Field Name Description
above 1500 bytes
Enable DNS SRV Enables use of DNS SRV records
SIP Global Settings
Enable Strict Branch -- The value of the branch must be after"z9hG4bK" in the VIA
Strict Branch field of the INVITE message received, or the phone will not respond to the INVITE.
Note: This will affect all lines.
Enable Group Enable SIP Group Backup. This will affect all lines.
Enable RFC4475 Enable or disable RFC4475. For default, enable it.
Registration Registration failure retry time – If registration fails, the phone will attempt to register
Failure Retry Time again. This will affect all lines.
Enable Strict UA
Enable or disable Strict UA Match
Match
DND Return Code Specify SIP Code returned for DND. Default is 480 -- Temporarily not available.
Reject Return
Specify SIP Code returned for Rejected call. Default is 603 – Decline.
Code
Busy Return Code Specify SIP Code returned for Busy. Default is 486 – Busy Here.

3.4.2 STUN

A STUN (Simple Traversal of UDP through NAT) server allows a phone in a private network to know its
public IP and port as well as the type of NAT being used. The
register itself to a SIP server so that it can make and receive calls while in a private network.
720p SIP Multi-unit Apartment Vandalproof Door Phone with RFID & PoE
equipment
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can then use this information to
HDP-5260PT