LG-Nortel IP LDK-20, Руководство по программированию

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IP LDK-20 Programming Manual System Feature
206
2.16.13 CO Transit - Out
Description
The CO TRANSIT-OUT is the CO line lend service that is executed by the request of the slave
networking system that want to connect PSTN. This service can increase the using efficiency of CO
line and reduce call costs by routing outgoing CO calls to the nearest appropriate point on the network.
The system should provide sufficient digit translation and string analysis options to enable the switch
to route the call correctly.
The figure 2.16.13 describes the CO TRANSIT-OUT operation on the networking connection
environment. At the first step, the station 202 of the slave system dials the CO TRANSIT-OUT code,
that is registered the network numbering plan table(ADMIN program 324). The term of CO TARNSIT-
OUT code is that a station of slave system can seize the PSTN CO line of the master system. At the
second step, the slave system seizes a CO line that is preprogrammed for transmitting the CO
TRANSIT-OUT code to the master system. And, the dialed code is transmitted to the master system.
At the third step, the master system seizes a CO line that is preprogrammed to serve the lend request
by the CO TRANSIT-OUT code. After seizing the PSTN CO line, the master system sends the digit
information to PSTN that is dialed from the station of the slave system. At the fourth step, the called
user of PSTN receives the ring. The caller and called users can make a conversation when the called
user is answered.