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84    VoIP subscriber gateways 
IMS monitoring 
IMS monitoring shows the state (active or inactive) of some services on the subscriber line provided that 
the remote control from IMS server is enabled for this line (IP Multimedia Subsystem). 
–  IMS management – shows whether the subscriber line service remote control from IMS server is 
enabled; 
–  Three-party conference – shows whether the 'Three-party conference' service activation command 
is received from IMS server; 
–  Call hold – shows whether the 'Call hold' service activation command is received from IMS server; 
–  Call waiting – shows whether the 'Call waiting' service activation command is received from IMS 
server; 
–  Hotline – shows whether the 'Hotline' service activation command is received from IMS server; 
–  Hotline number – shows phone number of ‘Hot line’ service activation command from IMS server; 
–  Hotline  timeout,  sec  –  shows  the  dialing  timeout  for  the  'Hotline'  service  in  the  activation 
command from IMS server; 
–  Call transfer – shows whether the ‘Call transfer’ service activation command is received from IMS 
server. 
4.2.9 ‘Call History’ submenu 
The device RAM may store up to 20 000 records for performed calls. If the record number exceeds 20 000, 
the oldest records (at the top of the table) will be removed, and new ones will be added at the end of the file. 
Log statistics will not be collected, when the history size is zero. 
Click ‘Change  call history settings’ to  switch  to  the ‘PBX/Call History’  section of subscriber  port settings 
(For detailed parameter configuration description, see Section 3.1.4.10). 
 
For mandatory cleaning a history, click ‘Clean history’ button.  
Call history saving  
To save history file on local PC, click ‘Download call history file’ button.  
Call history view  
Click ‘View call history’ to switch to a call log: