Nortel SRG50, Руководство по настройке

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Chapter 6 Setting up the private VoIP network 87
Survivable Remote Gateway 50 Configuration Guide
d Change the schedule time so that the schedule runs continuously ( Start Time 00:00:00,
Stop Time 23:59:59, MTWTFSS).
e Change the routing service ( Routing Svc ) to Auto .
f Select Overflow .
2 Define a route for calls to the main office over the VoIP trunks and a route to the main office
over the PSTN.
a Access the Dialing Plan - Routing panel ( Configuration > Telephony > Dialing Plan >
Routing ) and select the Routes tab.
b Add a new route (for example, 998).
c Ensure that the DN Type is Public (Unknown) .
d Assign the VoIP line pool to the route (select the line pool from the Use Pool pull-down
menu; default is BlocA ).
e Add another new route (for example, 999).
f Ensure that the DN Type is Public (Unknown) .
g In the External Number field, enter the PSTN number of the main office.
h Assign the PSTN line pool to the route (select the line pool from the Use Pool pull-down
menu; default is A ).
3
Add a destination code to provide access to the newly created routes. This code is used in both
normal and local modes for dialing the main office from the SRG50 site.
a Access the Dialing Plan - Routing panel ( Configuration > Telephony > Dialing Plan >
Routing ) and select the Destination Codes tab.
b Add a new destination code (for example, 678 ).
c With the Destination Code row highlighted, select the SRG schedule from the Alternate
Routes list ( Alternate Routes for Destination Code details panel).
d In the First Route field, enter 998 (the VoIP route).
e In the adjacent Absorbed Length field, select the number of digits to be absorbed. The
Absorbed Length applies to the digits of the destination code only.
Typically, the Absorbed Length is All for UDP and 0 for CDP.
f
In the Second Route field, enter 999 (the PSTN route).
g In the adjacent Absorbed Length field, select the number of digits to be absorbed.
Depending on the dialing plan, the destination code is integrated with the DN or is dialed as a
prefix to the DN. When a user calls the main office, the SRG50 examines the destination code to
determine the routing. If the
First Route , the VoIP trunks, is unavailable, the call is routed to the
Second Route , the PSTN, and the External Number is called. Because Overflow was selected, if
both the First Route and the Second Route are unavailable, the call is routed using the Normal
Route specified in the Normal Route column of the Destination Codes table. Because Auto was
selected, the routing occurs without manual intervention.