Bizfon 2000 Guida Utente

Bizfon Manual II: Administrator's Guide  

Administrator’s Menus 

Bizfon2000 and Bizfon4000 (SW Version 4.1.x) 

 

 

The  STUN Parameters page enables automatic NAT 
configuration through the STUN server and is used to configure 
the STUN (Simple Traversal of UDP over NAT) client on the 
Bizfon. This page requires the following data to be inserted: 

The  STUN Server text field requires the STUN server’s 
hostname or IP address. The STUN Port text field requires the 
STUN server port number. 

The Secondary STUN Server and Secondary STUN Port text 
fields respectively require the parameters of the secondary 
STUN server. 

The  Polling Interval drop down list contains the possible time 
intervals between referrals to the STUN server. 

The Keep-alive interval text field provides the options to select 
the time interval (in seconds) for keeping NAT mapping alive. 
The value should be in the range of 10 to 300 seconds. 

Fig. II-107: STUN Parameters page 

The NAT IP checking interval text field indicates the interval (in seconds) between the NAT IP checking attempts (used to distinguish the possible 
NAT IP address changes and to perform registration on the new host). The value should be in the range of 10 to 3600. 

The NAT Exclusion Table page includes a table where all possible IP ranges are listed that allows you to exclude some network addresses from 
being NATed. For example, if a Bizfon user needs to make SIP calls within the local network as well as outside of that network, all local IP addresses 
are required to be excluded from NAT traversal settings by being listed in this table. Otherwise, a malfunction may occur in SIP operations. 

The  NAT Exclusion Table page offers the following input 
options: 

Each record in the table has a corresponding checkbox 
assigned to its row. The checkbox is used to delete or to edit 
the corresponding record. Only one record may be edited at a 
time. An error message will appear if no selection is made or 
more than one is selected.  

Each column heading in the table is a link. By clicking on the 
column heading, the table will be sorted by the selected 
column. When sorting (ascending or descending), arrows will 
be displayed next to the column heading. 

The Add Entry page includes the following text fields: 

Add opens the Add Entry page where a new IP range can be 
added. 

 

Fig. II-108: NAT Exclusion Table page 

Edit opens the Edit Entry page where the IP range can be modified. This page includes the same components as the Add Entry page. 
The NAT Exclusion Table lists all possible IP ranges that are not included in the NAT process, but may be accessed directly. IP addresses that are 
not listed in the NAT Exclusion Table are accessed over NAT. 

IP address requires the IP address that is placed behind 
NAT within the local network. 

Subnet Mask requires the subnet mask corresponding to the 
specified IP address. 

 

Fig. II-109: NAT Exclusion Table - Add Entry page 

 Press 

the 

Add button on the NAT Exclusion Table page. The Add Entry page will appear in the browser window.  

 Specify 

an 

IP Address and its Subnet Mask in the corresponding text fields.  

 Press 

Save on the Add Entry page to add the selected IP range to the NAT Exclusion Table list. 

 
To Delete an IP Range from the NAT Exclusion Table 

 

Select the checkboxes of the corresponding IP range(s) that should to be deleted from the NAT Exclusion Table. Press Select all if all IP 
ranges should to be deleted. 

 Press 

the 

Delete button on the NAT Exclusion Table page. 

 

Confirm the deletion by pressing Yes. The IP range will then be deleted. To abort the deletion and keep the IP range in the list, press No.