E.F. Johnson Company VR-CM50 Manuel de l'opérateur télécharger pdf (Page 21)

4-1

Revised August 2001

Part No. 002-3139-078

CALL PROCESSOR (CP)

SECTION 4 CALL PROCESSOR (CP)

4.1 INTRODUCTION

The Call Processor (CP) controls the Multi-Net

System. These components interface with the Switch

as shown in Figure 3-5.

The Call Processor controls and continuously

monitors Switch operation, provides logging of infor-

mation for billing purposes, and performs other func-

tions such as processing certain types of calls. The

Call Processor program runs on a computer that has a

Windows NT

4.0 operating system and a Pentium

233 or better microprocessor.

One Call Processor is required for each Switch,

and it must be co-located with the Switch. The Call

Processor program must be running for the Switch to

function. If desired, the local Call Processor and

Subscriber Management Module can run on the same

computer. The following information describes the

data buses utilized by the Call Processor and some of

the main functions the Call Processor performs.

4.2 DATA BUSES

The NetIDB and NetCSB connect the Call

Processor to the Switch via the NetNIM (Network

Interface Module). The Ethernet port connects the Call

Processor to other Call Processors and System and

Subscriber Managers. Refer to Section 3 for more

information.

NetIDB (Net Intra-Terminal Data Bus)

The NetIDB is a 19,200 baud full duplex port

connected to the NetNIM (Network Interface Module).

The NetNIM buffers the Call Processor data to the

IDB (Intra-Terminal Data Bus). The Call Processor

communicates with the rest of the Switch modules on

the IDB via the NetNIM.

NetCSB (Net Channel Status Bus)

The NetCSB is a 19,200 baud full duplex port

connected to the NetNIM. The NetNIM buffers the

data from the CSB (Channel Status Bus) to the Call

Processor. The Call Processor communicates with the

rest of the Switch modules on the CSB via the

NetNIM.

4.3 SYSTEM CONFIGURATION

System configuration provides initialization of

modules and database management. When a module

sends an initialization request to the Call Processor,

the Call Processor searches the configuration database

and sends initialization information to the module. If

the module number is not found, the Call Processor

creates an alarm and places the module in standby

mode.

4.4 STANDARD GROUP CALL

A Standard Group Call is a call originated by a

mobile which is destined for a Group of mobiles in a

given Locality. If the Group Call does not exist in a

WAC (Wide Area Call) configuration, the call

processing is handled by modules external to the Call

Processor/Switch. If the Group Call does exist in a

WAC configuration, the Call Processor initiates Wide

Area Call Processing.

The Call Processor creates a Usage Accounting

record containing the Initiation Time/Ending Time of

the Standard Group Call.

4.5 WIDE AREA CALL

NOTE: Refer to Section 1.3 for more information on

wide area calls.

The Call Processor looks at each CSB (Channel

Status Bus) message and determines if Group Call data

is contained in a WAC (Wide Area Call) configuration.

If the Group Call Data does exist in a WAC configura-

tion, the Call Processor determines if there is an

existing WAM (Wide Area Module) configuration

containing the Group Call Data. If there is, the Call

Processor updates the Last Used Time in the WAM

configuration. If there is not an existing WAM config-

uration, the Call Processor creates a new WAM

configuration based on the Registration Database and

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