Grandstream Networks GRP26 Series Administration Guide

Table 16: BLF LED Definitions
NAT SETTINGS
If the devices are kept within a private network behind a firewall, we recommend using STUN Server. The following settings
are useful in the STUN Server scenario:
STUN Server
Under Settings🡪General Settings, enter a STUN Server IP (or FQDN) that you may have, or look up a free public STUN
Server on the internet and enter it on this field. If using Public IP, keep this field blank.
Use Random Ports
It is under Settings🡪General Settings. This setting depends on your network settings. When set to “Yes”, it will force random
generation of both the local SIP and RTP ports. This is usually necessary when multiple GRPs are behind the same NAT. If using
a Public IP address, set this parameter to “No”.
NAT Traversal
Idle Solid Green
Trying Flashing Green
Talking Solid Red
Proceeding (initator) Flashing Green
Proceeding (Receiver) Flashing Red
Incoming call Flashing Red
Idle Solid Red
Trying Solid Green
Talking Solid Green
Proceeding Flashing Green
Incoming call Flashing Green
Mode: Reserved (Red)
Call's State Light Indication
Offline
Off (Extension Board
Icon: Off)
Idle
Off (Extension Board
Icon: Idle)
Trying Solid Red
Talking Solid Red
Proceeding Solid Red
Incoming call Flashing Red
Mode: Reserved (Green)
Call's State Light Indication
Offline
Off (Extension Board
Icon: Off)
Idle
Off (Extension Board
Icon: Idle)
Trying Solid Green
Talking Solid Green
Proceeding Solid Green
Incoming call Flashing Green

Grandstream Networks GRP26 Series Specifications

General

Brand	Grandstream Networks
Model	GRP26 Series
Category	IP Phone
Language	English