Fax Relay For Sg3 Fax Machines - AudioCodes Mediant 3000 User Manual
Voip media gateway
Hide thumbs
Also See for Mediant 3000:
- User manual (1070 pages) ,
- Installation manual (90 pages) ,
- Hardware installation manual (88 pages)
Table of Contents
Advertisement
12.2.3.3 V.34 Fax Relay for SG3 Fax Machines
Super Group 3 (SG3) is a standard for fax machines that support speeds of up to 33.6
kbps through V.34 half duplex (HD) modulation. This section describes how to configure
the device to support V.34 (SG3) fax relay based on the ITU Specification T.38 version 3.
To enable the device to support V.34 fax relay (T.38) at SG3 speed:
1.
Define an IP Profile with the Fax Signaling Method (IsFaxUsed ini file) parameter set
to T.38 Relay (1).
2.
Set the DSP Version Template Number (DSPVersionTemplateNumber ini file)
parameter to 10 (for supporting up to 1,512 channels). This is done on the General
Settings page (see Configuring General Media Settings on page 181). Reset the
device to apply the setting.
3.
Select the codec used by the device to G.729 (or any other supported codec). This is
done in the Coders Table page (see 'Configuring Coders' on page 231). Note that
when the DSP Version Template is set to 10, the device supports only the G.711 and
G.729 audio codecs.
4.
On the Fax/Modem/CID Settings page (see 'Fax and Modem Capabilities' on page
156), configure the following:
•
Set the T38 Version (SIPT38Version ini file) parameter to T.38 version 3.
•
Set the Fax Relay Max Rate Fax (RelayMaxRate ini file) parameter to 33,600bps
(default).
•
Set the CNG Detector Mode (CNGDetectorMode ini file) parameter to Disable
(default).
•
Set the following parameters to Disable:
♦
♦
♦
♦
♦
5.
Set the V34FaxTransportType ini fle parameter to 1 (i.e., Relay).
6.
Set theT.38 Max Datagram Size (T38MaxDatagramSize ini file) parameter to 560
(default).
7.
Set the CEDTransferMode parameter to 0 (default).
Notes:
SIP User's Manual
V.21 Modem Transport Type (V21ModemTransportType ini file)
V.22 Modem Transport Type (V22ModemTransportType ini file)
V.23 Modem Transport Type (V23ModemTransportType ini file)
V.32 Modem Transport Type (V32ModemTransportType ini file)
V.34 Modem Transport Type (V34ModemTransportType ini file)
•
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.
164
Mediant 3000
Document #: LTRT-89712
Advertisement
Table of Contents
