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Appendix E

Parameters

Introduction

Some DPNSS functions use extra parameters not passed in function arguments. Also, some DPNSS service options use data stored in parameters. These parameters can be read and written by the application by calling ctaGetParmByName or ctaSetParmByName.

Function Parameters

The following tables contain DPNSS service parameters. For a detailed discussion of parameter management in CT Access, refer to the CT Access Developer's Reference Manual.

Dependent Function(s): dpnPlaceCall

Field Name

Type

Default

Units

Description

Sic1

WORD

0x10

DPNSS service indicator code 1 (see BTNR 188-4)

Sic2

WORD

0xFF

DPNSS service indicator code 2 (see BTNR 188-4)

Dependent Function(s): dpnStartProtocol

Field Name

Type

Default

Units

Description

CallChargeEnable

WORD

0

boolean

Allows sending/receiving of call charge information

Dependent Function(s): ctaWaitEvent

Field Name

Type

Default

Units

Description

MaxEventBuffer

WORD

50

buffer

Maximum number of buffers that the DPNSS service can simultaneously allocate for retrieving DPNSS feature information. Buffers are released by calling dpnReleaseBuffer.

Dependent Function(s): All

Field Name

Type

Default

Units

Description

Timeout

DWORD

60000

ms

Maximum time allowed by the application to receive acknowledgement from the DPNSS server process, when the application has sent a call control command.

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