Nat settings – Grandstream GXP1610 Administration Guide User Manual
Page 41

GXP1610/GXP1620/GXP1625/GXP1628
Administration Guide
Page 40 of 49
starting with the entered prefix and "telephoneNumber" field set.
LDAP Version
Selects the protocol version for the phone to send the bind requests. The 
default setting is "Version 3".
LDAP Name Attributes
Specify the "name" attributes of each record which are returned in the LDAP 
search result. This field allows the users to configure multiple space 
separated name attributes. 
Example: 
gn 
cn sn description 
LDAP Number Attributes
Specifies the "number" attributes of each record which are returned in the 
LDAP search result. This field allows the users to configure multiple space 
separated number attributes. 
Example: 
telephoneNumber 
telephoneNumber Mobile 
LDAP Display Name
Configures the entry information to be shown on phone's LCD. Up to 3 fields 
can be displayed. 
Example: 
%cn %sn %telephoneNumber 
Max. Hits
Specifies the maximum number of results to be returned by the LDAP server. 
If set to 0, server will return all search results. The default setting is 50. 
Search Timeout
Specifies the interval (in seconds) for the server to process the request and 
client waits for server to return. The default setting is 30 seconds. 
Sort Results
Specifies whether the searching result is sorted or not. The default setting is 
"No".
LDAP Lookup
Configures to enable LDAP number searching when dialing and receiving 
calls.
Lookup Display Name
Configures the display name when LDAP looks up the name for incoming call 
or outgoing call. This field must be a subset of the LDAP Name Attributes. 
Example: 
gn 
cn sn description 
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
