Dialogic 6.2 Manuale Utente

Managing Calls Using IP Telephony

November 2009

225

Call Progress Values

Brooktrout Bfv API has mapped all possible IP call INVITE

responses to Bfv call progress values. See

for values for

functions that provide a final call progress value:

Table 9. Mapping of SIP responses to Bfv FCP values

SIP
response
code

Bfv final call

Progress 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

when SDP media type and subtypes are

image and T.38 respectively.)

FCP_ANSWER_TONE_DETECT