Matrix ETERNITY NE System Manual 643
• Extension 3301 makes an outgoing call to an external number 2630555. The BLF key will indicate the
current call state of the CO-1 Trunk as “Trying” according to the LED indication supported by the SIP
Phone for this call state.
If the SIP phone supports text message display for call states, each call state will be displayed on the
Phone.
• When the external party answers the call, the call between the CO-1 and SIP Extension 3301 gets
matured. The BLF key will indicate the current call state of the CO Trunk as “Confirmed” according to the
LED indication supported by the SIP Phone for this call state.
• When the SIP Extension 3301 disconnects the call, SARVAM UCS will disconnect the call of external
number and the BLF key will display the call state of the CO as “Terminated” according to the LED
indication supported by the SIP Phone for this call state.
Similarly, the BLF key configured on the SIP Extension 3301 will display the call states of the CO-1 trunk
for incoming calls from external numbers.
Since multiple calls can be made through a single trunk, the BLF key will indicate the status of the first call
detected by the system. When the first call is terminated, the status of the second call (if ongoing) will be
indicated. Similarly, the status of all subsequent calls will be indicated after the previous call is terminated.
How to configure
To provide BLF to SIP extension users, you must do the following:
• Enable Allow Busy Lamp Field Subscription under “VoIP” for the desired SIP Extensions. See “SIP
Extensions” for more details.
• Assign a BLF Key for the trunk to be monitored on the SIP Phones registered as extensions. For
instructions, refer to the manufacturer’s documentation (Installation Guide/User Guide) for the respective
SIP Phones.
• To monitor the trunks, configure the BLF Key as per the table given below:
Trunk User ID part in SUBSCRIBE
Remarks
a
a.The number of ports mentioned here are for ETERNITY NENXIP50. For details regarding the
number of ports supported for ETERNITY NENX312/ETERNITY NENX416, see “Technical
Specifications of ETERNITY NENX”.
CO CO-x
Here, x should be a valid CO port number, that is,
from 1 to 4.
Mobile Mobile-x
Here, x should be a valid Mobile port number, that
is, from 1 to 2.
SIP SIP-x
Here, x should be a valid SIP Trunk number, that
is, from 1 to 8.
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