IPECS Release 5
Feature Description & Operation
5.0
2-147
2.69.2.13
CO Transit-Out
Description
The sub-system that has no connection to public network can make a use of the main-system that
has connection to public network as well as sub-system. This feature enables a user to maximize
use of the network and reduce call costs by routing outgoing calls to the nearest appropriate point on
the network. The system should provide sufficient digit translation or string analysis options to enable
the switch to route the call correctly.
Operation
1. A station of sub-system seizes CO line.
2. The dummy CO dial tone (in case of PRI real dial tone from PX will be heard) is provided from the
main system or the sub-system. According to the CO dial-sending mode of en-block or overlap,
the CO dial tone providing system is decided.
3. Dial the telephone number of public network user.
4. The dialed telephone on public network receives the call alert ring, and the station of sub-system
hears the ring-back tone.
5. The call connection between the public network telephone and the station of sub-system is
established, when the call is answered.
Conditions
1. To use CO transit-out service, the sub-system user must seize the CO line explicitly.
2. The original station’s COS is applied for toll restriction.
3. Outside caller hears busy tone when a networking path is not available during transit-out.
4. In the main system, the attendant must have the CO access authority about the public connection
of figure.
5. For CO transit out, any code will be available using NET routing table (PGM 324). However, if
there is a conflict between NET routing table and system numbering plan, system numbering plan
has high priority.
6. If you want to use some code for CO transit out, then its type should be PSTN (PGM 324/BTN1).
7. You can determine that your code is repeated or not by PGM324/BTN7.
8. You must decide that a CO line is connected to PSTN or Network interval at PGM 322 BTN4.
9. Main-system can request a password to sub-system user to apply COS to transit-out call at PGM
324 BTN 12.
10. Sub-system can decide to display dialed digits or not in SMDR because it can contain password
(PGM 324 BTN 13).
Programming
SYSTEM
1) Networking CO Line Attribute (PGM 322 / BTN 4)
2) Networking Routing Table (PGM324)
Содержание IPECS
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