Grandstream UCM6100 User Manual for 1.0.9.25 - Manual (Page 233)

Firmware Version 1.0.9.25 UCM6100 Series IP PBX User Manual Page 232 of 303
the remote extensions will be listed under "Available Extensions". If not,
manually enter the remote extensions under "Special Extensions" field.
Special Extensions
Manually enter the remote extensions in the peer/register trunk to be
monitored in the event list.
Valid format: 5000,5001,9000
Figure 135: Create New Event List
Remote extension monitoring works on the UCM6100 via event list BLF, among Peer SIP trunks or
Register SIP trunks (register to each other). Therefore, please properly configure SIP trunks on the
UCM6100 first before using remote BLF feature. Please note the SIP end points need support event list
BLF in order to monitor remote extensions.
When an event list is created on the UCM6100 and remote extensions are added to the list, the UCM6100
will send out SIP SUBSCIRBE to the remote UCM6100 to obtain the remote extension status. When the
SIP end points registers and subscribes to the local UCM6100 event list, it can obtain the remote extension
status from this event list. Once successfully configured, the event list page will show the status of total
extension and subscribers for each event list. Users can also select the event URI to check the monitored
extension's status and the subscribers' details.