Managing Calls Using IP Telephony

Call Progress Values

Brooktrout Bfv API has mapped all possible IP call INVITE responses to Bfv call progress values. See Table 9 for values for functions that provide a final call progress value:

Table 9. Mapping of SIP responses to Bfv FCP values

SIP

Bfv final call

Progress code

response

 

 

code

 

 

 

 

 

486

Busy here

FCP_BUSY1

 

 

 

600

Busy everywhere

FCP_ROBUSY

 

 

 

503

Service Unavailable

FCP_SITINTC

 

 

 

180

Ringing

FCP_RING1

 

 

 

200

OK (when in response to an INVITE

FCP_ANSWER_TONE_DETECT

 

when SDP media type and subtypes are

 

 

image and T.38 respectively.)

 

 

 

 

November 2009

225

Page 225
Image 225
Dialogic 6.2 Call Progress Values, Mapping of SIP responses to Bfv FCP values, Bfv final call Progress code Response Code