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82    VoIP subscriber gateways 
4.2.8 ‘Telephony’ submenu 
Use this submenu to monitor status of customer units, call groups and serial groups. 
 
FXS status – the ‘FXS status’ table displays status of the device subscriber units and registration status on 
SIP proxy server. Click ‘FXS port settings’ to go to the section of ‘PBX/FXS’ subscriber port settings (The detailed 
information about configured parameters see section 3.1.4.3). 
–  Port number – port number assigned to the subscriber unit; 
–  Local number – phone number, assigned to the subscriber unit; 
–  Port state – subscriber unit status.  
The list of possible state: 
–  hangup – handset is hung up; 
–  hangdown – handset is hung down; 
–  dial – dialing a phone number of callee; 
–  calling – call to the remote side (attempt to establish connection); 
–  ringback – ringback tone will be sent into the line (for outcoming call); 
–  talking – connection is established from the remote side; 
–  ringing – ring voltage is transmitted to the line (when incoming call is received); 
–  holding – remote subscriber is put on hold; 
–  holded – port is put on hold by remote side; 
–  3way call – three-way conference;