Welltech ePBX80 V.1.1 - Manual (Page 53)

Welltech Technology Co., Ltd. 53
Level. [ext-only] means this subscriber can only call to
Extension. [ext+R1] means the subscriber with such Dial Plan
can call to Extension and Route Level with R1. [ext+R12]
means the subscriber with such Dial Plan can call to Extension
and Route Level with R1 and R2. [ext+R123] means the
subscriber with such Dial Plan can call to Extension and Route
Level with R1, R2 and R3. [ext+allroutes] means the
subscriber with such Dial Plan can call to Extension and Route
Level with R1, R2, R3 and R4.
Note:
For more information about Route Level, please refer to
Chapter 3.2.7 Outgoing Routing. At webpage configuration,
Go to Configuration  Outgoing Routing  Routed
Features  Route Level.
NAT Traversal If the Extension device was installed behind a device
performing NAT, such as firewall or router, and need to register
to ePBX80 on Physical internet network, then user has to
enable this function. Enable NAT Traversal to force ePBX80 to
ignore the contact information for the Extension and use the
address from which the packets are being received.
BLF Enable BLF (Busy Line Field) function for this extension. In
general case, BLF was used with IP Phone with LCD display to
indicate your desire’s extension or FXO line busy status.
Apply Click Apply button to save your customized settings and exit
this screen.
Cancel Click Cancel button to quit this screen without saving.
Click Quick Delete. The screen appears as shown below.