Kentrox AI232 - Manual (Page 148)

AI232 Version 9.6x User’s Guide
Alias and Call Routing Configuration: Overview
7-2
Overview
AI232 uses aliases to route calls across the backplane of AIswitch. Each incoming
call’s routing information must match an entry in the alias table, or else the call is
rejected. When AI232 is in switch mode, the alias table is stored on AI198. When
AI232 is in standalone mode, the alias table is stored in AI232’s local memory. For
more information about alias translation and macros, see sections
Call Routing on
page 7-4 and Alias Macros on page 7-19 .
Figure 7-1 displays a typical call processing data flow scenario where AI232 is used.
Data flow can be upstream or downstream, depending on the direction from which the
data originates.
Figure 7-1 Call Data Flow
In Figure 7-1 , an asynchronous protocol call is coming into AI232 card A and needs to
pass over the IRB and be sent out AI232 card B. Refer to the figure to follow the flow
of the call.
The following events occur if the data flow is from left to right:
1. The data comes into AI232 card A as an asynchronous packet.
2. The data travels upstream and is converted into a TCP call.
3. The data starts downstream through the ASY protocol option to preserve the
packetization. Refer to ASY on page 7-18 for information about the ASY protocol.
4. The data is sent out AI232 card A over TCP on the IRB.
downstream
Async TCP
ASY
up
stream
Incoming
IR
B
Asynchronous
Call
Outgoing
TCP/IP
Call
downstream
TCP Async
up
s
tre
am
ASY
AI232 Card B
Incoming
TCP/IP
Call
Outgoing
Asynchronous
IP address
172.16.30.200
downstream
upstream
downstream
up
stream
AI232 Card A
call to asy.4.2
IP address
172.16.30.100