User's Manual
178
Document #: LTRT-89729
Mediant 3000
e.
Set the 'V.22 Modem Transport Type' parameter to
Disable
(V22ModemTransportType = 0).
f.
Set the 'V.23 Modem Transport Type' parameter to
Disable
(V23ModemTransportType = 0).
g.
Set the 'V.32 Modem Transport Type' parameter to
Disable
(V32ModemTransportType = 0).
h.
Set the 'V.34 Modem Transport Type' parameter to
Disable
(V34ModemTransportType = 0).
5.
Set the ini file parameter, V34FaxTransportType to 1 (i.e., relay).
6.
Set the ini file parameter, T38MaxDatagramSize to 560 (default).
7.
Set the ini file parameter, CEDTransferMode to 0 (default).
Notes:
•
The T.38 negotiation should be completed at call start according to V.152
procedure (as shown in the INVITE example below).
•
T.38 mid-call Re-INVITEs are supported.
•
If the remote party supports only T.38 Version 0, the device
"downgrades" the T.38 Version 3 to T.38 Version 0.
For example, the device sends or receives the following INVITE message, negotiating both
audio and image media:
INVITE sip:[email protected];user=phone SIP/2.0
Via: SIP/2.0/UDP 10.8.6.55;branch=z9hG4bKac1938966220
Max-Forwards: 70
From: <sip:[email protected]>;tag=1c1938956155
To: <sip:[email protected];user=phone>
Call-ID: [email protected]
CSeq: 1 INVITE
Contact: <sip:[email protected]:5060>
Supported: em,100rel,timer,replaces,path,resource-priority,sdp-
anat
Allow:
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUB
SCRIBE,UPDATE
Remote-Party-ID:
<sip:[email protected]>;party=calling;privacy=off;screen=no;screen-
ind=0;npi=1;ton=0
Remote-Party-ID: <sip:[email protected]>;party=called;npi=1;ton=0
User-Agent: Audiocodes-Sip-Gateway-/v.6.00A.013.007
Content-Type: application/sdp
Content-Length: 433
v=0
o=AudiocodesGW 1938931006 1938930708 IN IP4 10.8.6.55
s=Phone-Call
c=IN IP4 10.8.6.55
t=0 0
m=audio 6010 RTP/AVP 18 97
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:97 telephone-event/8000
a=fmtp:97 0-15
a=ptime:20
a=sendrecv
m=image 6012 udptl t38
a=T38FaxVersion:3
Summary of Contents for Mediant 3000
Page 2: ......
Page 26: ...User s Manual 26 Document LTRT 89729 Mediant 3000 Reader s Note...
Page 27: ...Part I Getting Started with Initial Connectivity...
Page 28: ......
Page 40: ...User s Manual 40 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 41: ...Part II Management Tools...
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Page 98: ...User s Manual 98 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 103: ...Part III General System Settings...
Page 104: ......
Page 113: ...Part IV General VoIP Configuration...
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Page 224: ...User s Manual 224 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 275: ...Part V Gateway and IP to IP Application...
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Page 399: ...Part VI Session Border Controller Application...
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Page 464: ...User s Manual 464 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 465: ...Part VII Stand Alone Survivability Application...
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Page 494: ...User s Manual 494 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 497: ...Part VIII IP Media Capabilities...
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Page 501: ...Part IX High Availability System...
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Page 515: ...Part X Maintenance...
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Page 552: ...User s Manual 552 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 562: ...User s Manual 562 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 565: ...Part XI Status Performance Monitoring and Reporting...
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Page 609: ...Part XII Diagnostics...
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Page 638: ...User s Manual 638 Document LTRT 89729 Mediant 3000 Reader s Notes...
Page 639: ...Part XIII Appendix...
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Page 871: ...Version 6 6 871 Mediant 3000 User s Manual 55 Selected Technical Specifications Reader s Notes...