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4-10 IMACS System Release 5.1.6 Server Cards
Model No.
Running Head
Introduction ACS-PRI/BRI Card
Thus, if local routing is disabled, any call coming into the system on a network side (i.e., local)
D channel will be routed only to a user side D channel based on the called number. Even if the
called number matches, such a call will never be routed to an HSU port or a network side D
channel when local routing is disabled.
If local routing is enabled, then any call coming in on a D channel will be routed to the first
matching phone number, regardless of whether or not the match is for a local device.
Figure 4-6 shows a system connected to two carriers (A and B), two ISDN PBXs, two video
codecs (#1 and #2) and a LAN router. The examples that follow help explain the call routing
parameters.
Figure 4-6. Call Routing
In the example shown in Figure 4-6, the following call routings will occur:
• An incoming call to 700-737-2345 from either carrier will be routed to HSU port #1.
• Any outgoing call from any HSU port will be routed to the D channel specified in the call
profile including D channels #3 and #4 to the PBXs.
• A call to 510-623-1574 from the PBX will be routed to carrier B.
• A call to 800-444-2400 from either carrier will be routed to PBX #2.
• A call from either PBX to 700-737-5511 will be routed to HSU #3 if local routing is
enabled, but routed to Carrier A if local routing is disabled.
Carrier A
ISDN Switch
Carrier B
ISDN Switch
700-xxx-xxxx
415-940-77xx
ISDN PBX #1
700-737-2345 700-737-4567 700-737-5511
Video Codec #1 Video Codec #2 LAN Router
800-444-2xxx
xxx-xxx-xxxx
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HSU#1 HSU#2 HSU#3
ISDN PBX #2