| CallingPres( )
|
Changes the presentation for the Caller ID
|
CallingPres(presentation)
Changes the presentation parameters for the
Caller ID on a Q931 PRI connection. These parameters should be set
before placing an outgoing call. The argument
presentation controls two things: whether or not
the person being called can view the Caller ID information (known
as presentation), and whether or
not the Caller ID information has been verified by an authoritative
source (known as screening).
|
This application has been replaced by the
SetCallerPres( ) application, which is easier to use and
less dependent on the internal Zaptel structures.
|
|
This application takes the call presentation
setting and the screening setting and combines them into one
number. The values themselves are defined in the ITU Q931 standard,
as shown in Tables B-1 and B-2.
Table B-1. Screening is controlled by
bits 2 and 1
|
Bit 2
|
Bit 1
|
Explanation
|
|
0
|
0
|
Caller ID information was provided by the user,
and not screened.
|
|
0
|
1
|
Caller ID information was provided by the user,
and successfully verified.
|
|
1
|
0
|
Caller ID information was provided by the user,
and verification failed.
|
|
1
|
1
|
Caller ID information was provided by the
network.
|
Table B-2. Presentation is controlled by
bits 7 and 6
|
Bit 7
|
Bit 6
|
Explanation
|
|
0
|
0
|
Presentation of the Caller ID information is
allowed.
|
|
0
|
1
|
Presentation of the Caller ID information is
restricted.
|
|
1
|
0
|
The number is not available due to
interworking.
|
|
1
|
1
|
Reserved.
|
Bits 3, 4, 5, and 8 should all be set to zero
(0). Please note that the bits are numbered from most
significant to least significant, like this: 87654321.
; set presentation to:
; Presentation Allowed (00000000)
; Network Provided (00000011)
; ------------------ ----------
; Result = 3 (bitwise AND) (00000011)
exten => 123,1,CallingPres(3)
exten => 123,2,Dial(Zap/g1/8885551212)
; set presentation to:
; Presentation Restricted (00100000)
; User-provided, verified, and passed (00000001)
; ------------------ ----------
; Result = 33 (bitwise AND) (00100001)
exten => 124,1,CallingPres(33)
exten => 124,2,Dial(Zap/g1/8885551213)
See Also
SetCallerPres(
), SetCallerID(
)
|
