LG-Nortel IP LDK-20, Programming Manual

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IP LDK-20 Programming Manual System Feature
204
2.16.12 CO Transit - In
Description
The CO TRANSIT-IN is the net call routing service about the incoming DID/MSN call. The incoming
DID call can reroute to the net call destination in another networking system.
The figure 2.16.12 describes the CO TRANSIT-IN operation on the networking connection
environment. At the first step, the outside caller makes a DID call to the station 202, so the DID call
request is arrived at the master system. The networking system of station 202 is not connected to
PSTN directly, but it can be connected to PSTN through the another networking system(master
system) as illustrated figure 2.16.8. At the second step, the master system checks the received DID
call destination. If the DID destination is matched with a station of system, the DID call is routed to the
station. But, if the DID destination is not matched, the master system is search the network numbering
plan table(see Ref.1), whether the destination is matched with a station of the registered another
networking system. In this case, the master system transfers the received DID call request to the
found networking system, like to the third step. At the fourth step, the CO transit-in DID call is ringing
to the station 202. The caller can make a conversation when the station 202 is answered.
Figure 2.16.12 The CO transit-in operation on the networking connection environment
Step Flow
1 Outside Caller dials a station in slave system
2
Call comes in master system and search networking
numbering plan table.
3
Master transfers the call request to the found
networking system.
4 Call is ringing to station 202
5 Conversation
Call Flow
Internet
PSTN or ISDN
202
Step 1
Step 3
Step 4
Step 5
Step 2
Additional Programming
M M a a s s t t e e r r : :
PGM 143 FLEX 4 (DID Conversion Type) = 2
PGM 231 (Flexible DID Table) = Assign Slave
extension