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Managing Calls Using IP Telephony
November 2009 223
[host_module.1/t38parameters]
t38_max_bit_rate=14400
t38_fax_fill_bit_removal=false
t38_fax_transcoding_MMR=false
38_fax_transcoding_JBIG=false
t38_fax_rate_management=transferredTCF
t38_fax_udp_EC=t38UDPRedundancy
t38_UDPTL_redundancy_depth_image=2
t38_UDPTL_redundancy_depth_control=1
t38_t30_fast_notify=false
BFV APPLICATION
BT_ZERO(args);
args.phonenum = “john.brooktrout.com”
args.call_protocol_code = CALL_PROTOCOL_FAX
BfvLineOriginateCall(lp, &args);
SIP INVITE
1 INVITE sip:john.brooktrout.com SIP/2.0
2 From: <sip:user@brooktrout.com>;tag=0-13c4-40aa926b-1b5fbbff-974
3 To: <sip:john.brooktrout.com>
4 Call-ID: 47081b4-0-13c4-40aa926b-1b5fbbeb-2086@brooktrout.com
5 CSeq: 1 INVITE
6 Via: SIP/2.0/UDP 208.129.16.72:5060;branch=z9hG4bK-40aa926b-1b5fbbff-e9d
7 Contact: <sip:208.129.16.72>
8 Max-Forwards: 20
9 Content-Type: application/SDP
10 Content-Length: 452
11 v=0
12 o=username 2209448059 0759125174 IN IP4 208.129.16.72
13 s=session_name
14 i=session_description
15 u=user@brooktrout.com
16 e=email@brooktrout.com
17 p=+1-4085551212
18 t=0 0
19 m=audio 56004 RTP/AVP 0
20 c=IN IP4 208.129.52.105
21 a=rtpmap:0 pcmu/8000
22 m=image 56004 udptl t38
23 c=IN IP4 208.129.52.105
24 a=T38FaxVersion:0
25 a=T38MaxBitRate:14400
26 a=T38FaxRateManagement:transferredTCF
29 a=T38FaxUdpEC:t38UDPRedundancy
SIP INVITE DESCRIPTION
1 Defined by args.phonenum field passed to BfvLineOriginateCall().
2 Defined by the sip_From setting in the call control configuration file.
3 Defined by args.phonenum field passed to BfvLineOriginateCall().