<Functions and Operating Procedures of External Interface System>
External interfaces
1. Types of external interfaces
The external interfaces are classified into four types: OD interface, LD interface, CB interface, and Tie-line inter-
face (depending upon their external equipment).
(1) The OD interface is connected to an OD trunk of PBX via 4 wires.
(2) The LD interface is connected to an LD trunk of PBX via 2 wires.
(3) The CB interface is connected to PBX extension lines or to telephone lines.
(4) The tie-line interface connects more than one intercom exchange via rented lines.
2. Features of interfaces
(1) OD interface
When mounted on the EXES-6000 series exchange (EX-610/620/630) and connected to the remote PBX, the
OD interface provides the system with mutual paging and calling functions via the PBX extension telephones
of a distant area.
(2) LD interface
When mounted on the EXES-6000 series exchange (EX-610/620/630) and connected to a nearby PBX, the
LD interface provides the system with mutual paging and calling functions via the PBX extension telephones.
(3) CB interface
When mounted on the EXES-6000 series exchange (EX-610/620/630) and directly connected to the PBX
extensions, the CB interface provides the system with direct calling and call answering functions via tele-
phone lines.
Use this interface when you wish to directly linkup with a telephone line.
In addition, you can use the CB-600 lines in order to interface with pagers and to page/answer city pagers.
(4) Tie-line interface
When mounted on the EXES-6000 series exchange (EX-610/620/630) and connected to the remote extension
system, the Tie-line interface provides the system with mutual paging, calling, and conversation functions.
3. Numbering schedule external interfaces
Before the external interfaces can function, they first need to be registered. The calling procedure to the respective
interface line (selected number) should be registered through station No. 200. (For the details of registration, refer
to the Installation Manual for the CP-66).
(1) OD interface
When using the OD interface, program the line number to be used into the line seizure operation (1 digit
or 2 digits) according to the OD-600 line registration (Function Code 23 of No. 200 programing). If the OD
line is divided into more than one group and each group is registered in separate line seizure operations, the
interface can be connected to more than one PBX.
(2) LD interface
Similarly, the LD line number to be used has to be registered when using the interface. (See LD-600 line
registration of Function Code 24 of No. 200 programing.) By dividing the line into more than one group
and registering each group in separate line seizure operation, the interface can be connected to more than
one PBX.
(3) CB interface
Similarly, the line number to be used has to be registered when using the interface. Also register the group
number of stations which ring when there are incoming telephone calls and from which the calls are answered.
(4) Tie-line interface
Similarly, the line number to be used has to be registered when using the Tie-line interface. Dividing the line
into more than one group and registering each group in separate line seizure operations allow the interface
to be connected to more than one PBX.
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