Welltech ePBX80 V.1.1 - Manual (Page 67)

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to Chapter 3.2.4 SIP Extension.
Route Timeout Click to enable this function. ePBX80 will drop this call if
receiver device do not response this call within Timeout period.
See
Chapter 3.2.4 SIP Extension at Absolute Timeout in
details.
Route Level Select one from R1, R2, R3 or R4. Suppose one route Level was
selected at R3 and one Outgoing Routing rule with prefix 0.
That means only those extensions with Dial Plan [ext+R123]
and [ext+allroutes] can use such record because only these
two Dial Plan contain the Route Level of R3.
Apply Click the Apply button to save your customized settings and
exit this screen.
Cancel Click the Cancel button to exit this screen without saving.
Example of Outgoing Routing:
If user set up prefix as
002 , digits length as 12, Primary destination as 888, Drop as 3 ,
and Add as 0 . When one extension dials 002 912345678, according to above Outgoing
Routing, the following number will be sent out.
002 912345678→912345678 (Drop 3 digits) →0912345678 (Add 0 )
Finally, ePBX80 will send out 0912345678 to Trunk ID 888.