89  VoIP Subscriber Gateways 
 
Changes in this submenu take effect immediately after clicking the 'Apply' button. Device 
reboot is not required. 
 To  store changes to  the operative memory of  the device,  click the  Save  Changes button.  To 
store settings into the non-volatile memory, click Apply button. 
2.4.7 The ‘Serial groups’ submenu 
In the serial group each new call occupies first free port thereby implementing the ‘multichannel 
phone’ mode. In ‘multichannel phone’ mode, a call occupies one port. When all the ports are busy, 
new call will be put in queue if queue has free ports (otherwise call will be broken up). When port will 
be free, the first port of queue will be sent to this free port. Thus, maximum number of calls, which can 
be sent  to  the serial  group, is  determined by sum  of  port number in  the  group and by  size of call 
queue.  Throughout  its  existence,  each  individual  call  is  transmitted  only  to  the  one  port  that  it 
occupied initially. It is the main difference from call group where the first received call occupies all the 
ports (call is transmitted to these ports in accordance with selected group type) and the next call is put 
in free place of queue (if queue does not have free place, the call is broken up). At that, maximum 
number of incoming calls are determined as ‘size of queue + 1’. 
Click  ‘Go  to  the  page Serial  groups  status’  button  for  the  rapid  transition  to  the 
‘Status/Telephony’ submenu (see section 3.2.8), where monitoring statistic of status for customer unit, 
call group and series selection is available. 
 
To add group click the ‘Add a new group’ button. After that, the form for editing a serial group 
will be opened: